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ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/World_War_I_cryptography" title="Special:EditPage/World War I cryptography">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22World+War+I+cryptography%22">"World War I cryptography"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22World+War+I+cryptography%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22World+War+I+cryptography%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22World+War+I+cryptography%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22World+War+I+cryptography%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22World+War+I+cryptography%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">May 2011</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <p>With the rise of easily-intercepted <a href="/wiki/Wireless_telegraphy" title="Wireless telegraphy">wireless telegraphy</a>, codes and ciphers were used extensively in <a href="/wiki/World_War_I" title="World War I">World War I</a>. The decoding by <a href="/wiki/Admiralty_Civilian_Shore_Wireless_Service" title="Admiralty Civilian Shore Wireless Service">British Naval intelligence</a> of the <a href="/wiki/Zimmermann_telegram" title="Zimmermann telegram">Zimmermann telegram</a> helped bring the United States into the war. </p><p><a href="/wiki/Trench_code" title="Trench code">Trench codes</a> were used by field armies of most of the combatants (Americans, British, French, German) in World War I.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>The most commonly used codes were simple <a href="/wiki/Substitution_cipher" title="Substitution cipher">substitution ciphers</a>. More important messages generally used mathematical encryption for extra security. The use of these codes required the distribution of codebooks to military personnel, which proved to be a security liability since these books could be stolen by enemy forces.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Britain">Britain</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=World_War_I_cryptography&action=edit&section=1" title="Edit section: Britain"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Ztel2.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/14/Ztel2.jpg/220px-Ztel2.jpg" decoding="async" width="220" height="462" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/1/14/Ztel2.jpg 1.5x" data-file-width="295" data-file-height="619" /></a><figcaption>Zimmermann telegram as decoded by Room 40</figcaption></figure> <p>British decrypting was carried out in <a href="/wiki/Room_40" title="Room 40">Room 40</a> by the Royal Navy and in <a href="/wiki/MI1" title="MI1">MI1</a> by British Military (Army) Intelligence. </p> <ul><li><a href="/wiki/Zimmermann_telegram" title="Zimmermann telegram">Zimmermann telegram</a></li> <li><a href="/wiki/Arthur_Zimmermann" title="Arthur Zimmermann">Arthur Zimmermann</a></li> <li><a href="/wiki/MI1" title="MI1">MI1</a> British Military (Army) Intelligence</li> <li><a href="/wiki/Room_40" title="Room 40">Room 40</a> Royal Navy (Britain)</li> <li><a href="/wiki/Alastair_Denniston" title="Alastair Denniston">Alastair Denniston</a> Room 40</li> <li><a href="/wiki/James_Alfred_Ewing" class="mw-redirect" title="James Alfred Ewing">James Alfred Ewing</a> Room 40, first head</li> <li><a href="/wiki/Nigel_de_Grey" title="Nigel de Grey">Nigel de Grey</a> Room 40</li> <li><a href="/wiki/William_R._Hall" class="mw-redirect" title="William R. Hall">William R. Hall</a> ‘Blinker’ Hall, Room 40, second head</li> <li><a href="/wiki/Malcolm_Vivian_Hay" title="Malcolm Vivian Hay">Malcolm Vivian Hay</a>, MI1(b), head from 1915</li> <li><a href="/wiki/Dilly_Knox" title="Dilly Knox">Dilly Knox</a> Room 40</li> <li><a href="/wiki/Oliver_Strachey" title="Oliver Strachey">Oliver Strachey</a> MI1</li> <li><a href="/wiki/William_Montgomery_(cryptographer)" title="William Montgomery (cryptographer)">William Montgomery (cryptographer)</a> Room 40</li> <li><a href="/wiki/Playfair_cipher" title="Playfair cipher">Playfair cipher</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Russia">Russia</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=World_War_I_cryptography&action=edit&section=2" title="Edit section: Russia"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>In the 1914 <a href="/wiki/Battle_of_Tannenberg" title="Battle of Tannenberg">Battle of Tannenberg</a>, different corps of the Russian Imperial army were unable to decipher each others messages, so they sent them in plain text. They were easily intercepted. Meanwhile, German cryptanalysts were also able to read the enciphered ones. <sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></li></ul> <ul><li><a href="/wiki/Ernst_Fetterlein" title="Ernst Fetterlein">Ernst Fetterlein</a> was in the Tsarist Russian Ministry of Foreign Affairs from 1896 and solved (among others) German, Austrian and British codes. He became chief cryptographer with the rank of admiral. With the Russian Revolution in 1917 he fled to Britain and was recruited to Room 40 in June 1918 to work on Austrian, Bolshevik and Georgian codes.</li> <li>The Russians used an overcomplicated version of the <a href="/wiki/Vigen%C3%A8re_Cipher" class="mw-redirect" title="Vigenère Cipher">Vigenère Cipher</a>. It was broken within three days by Austro-Hungarian cryptanalyst <a href="/wiki/Hermann_Pokorny" title="Hermann Pokorny">Hermann Pokorny</a>.</li></ul> <div class="mw-heading mw-heading2"><h2 id="France">France</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=World_War_I_cryptography&action=edit&section=3" title="Edit section: France"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The French Army employed <a href="/wiki/Georges_Painvin" title="Georges Painvin">Georges Painvin</a>, and <a href="/wiki/%C3%89tienne_Bazeries" title="Étienne Bazeries">Étienne Bazeries</a> who came out of retirement, on German ciphers. Due to their prewar activities, the French were more prepared than any other nation involved in the war to decode German radiograms. At the beginning of the war, France had eight intercept stations: Maubeuge, Verdun, Toul, Epinal, Belfort, Lille, Rheims, and Besançon. During the war, they set up many more stations, including one in the Eiffel Tower. According to Colonel Cartier of the War Ministry, France intercepted over 100,000,000 words from German radiograms during the course of the war.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </p> <ul><li>The <a href="/wiki/Tableau_de_Concordance" title="Tableau de Concordance">Tableau de Concordance</a> was the main French diplomatic cipher.</li></ul> <div class="mw-heading mw-heading2"><h2 id="Germany_and_Austria-Hungary">Germany and Austria-Hungary</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=World_War_I_cryptography&action=edit&section=4" title="Edit section: Germany and Austria-Hungary"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The <a href="/wiki/Imperial_German_Army" title="Imperial German Army">Imperial German Army</a> and the <a href="/wiki/Austro-Hungarian_Army" title="Austro-Hungarian Army">Austro-Hungarian Army</a> intercepted Russian radio communications traffic, although German success at the <a href="/wiki/Battle_of_Tannenberg_(1914)" class="mw-redirect" title="Battle of Tannenberg (1914)">Battle of Tannenberg (1914)</a> was due to interception of messages between the <a href="/wiki/Imperial_Russian_Army" title="Imperial Russian Army">Imperial Russian Army</a> commanders in cleartext. </p><p>The German <a href="/wiki/Abhorchdienst" title="Abhorchdienst">Abhorchdienst</a>, a code-breaking bureau composed mainly of mathematicians, was established in 1916. </p><p>The Germans had specific regulations regarding which kinds of codes and ciphers could be used under given circumstances. Within three kilometers of the front lines, known as the danger zone, all communications were required to be in a code known as the three-number code. This was the only code or cipher permitted. Behind this danger zone, another code known as the three-letter code was allowed to be used. Communications between divisions, corps, and army headquarters were done with the ADFGVX cipher.<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>The ADFGX and <a href="/wiki/ADFGVX" class="mw-redirect" title="ADFGVX">ADFGVX</a> field ciphers were a modified <a href="/wiki/Polybius_square" title="Polybius square">polybius system</a> with single order double columnar transposition and frequent key change, with letters optimized for Morse. It was later broken by the famous French cryptanalyst <a href="/wiki/Georges_Painvin" title="Georges Painvin">Georges Painvin</a>. The breaking of the ADFGX cipher by Painvin was the second time during the war that cryptanalysis played a major role in shaping events (the first being the interception and cracking of the Zimmerman Telegram). By breaking the cipher, the French were able to decode an intercepted message about the forwarding of munitions for a German offensive, letting the French know where and when the offensive would occur, and thus allowing them to stop it. This message became known as "The Radiogram of Victory."<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="United_States">United States</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=World_War_I_cryptography&action=edit&section=5" title="Edit section: United States"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><a href="/wiki/Herbert_Yardley" title="Herbert Yardley">Herbert Yardley</a> began as a code clerk in the State Department. After the outbreak of war he became the head of the cryptographic section of Military Intelligence Section <a href="/wiki/Black_Chamber" title="Black Chamber">(MI-8)</a><sup id="cite_ref-Codebreakers_7-0" class="reference"><a href="#cite_note-Codebreakers-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> and was with the American Expeditionary Force in World War I as a Signals Corps cryptologic officer in France. He later headed the Cipher Bureau, a new cryptanalysis group started in 1919, immediately after World War I, and funded jointly by the State Department and the US Army. </p><p>Some American cryptography in World War I was done at the <i><a href="/wiki/Riverbank_Laboratories" title="Riverbank Laboratories">Riverbank Laboratories</a></i>, Chicago, which was privately owned by Colonel George Fabyan. <a href="/wiki/Elizebeth_Friedman" class="mw-redirect" title="Elizebeth Friedman">Elizebeth Friedman</a>, <a href="/wiki/William_F._Friedman" title="William F. Friedman">William F. Friedman</a> and <a href="/wiki/Agnes_Meyer_Driscoll" title="Agnes Meyer Driscoll">Agnes Meyer Driscoll</a> worked there. </p><p>The US Navy used the cryptographic code <a href="/wiki/A-1_(code)" title="A-1 (code)">A-1</a>. The US Navy cryptanalysis group, <a href="/wiki/OP-20-G" title="OP-20-G">OP-20-G</a>, was also started after World War I (in 1922). </p><p>The US also started employing Indian <a href="/wiki/Code_talker" title="Code talker">code talkers</a> in World War I, initially with members of the Cherokee and Choctaw tribes. </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=World_War_I_cryptography&action=edit&section=6" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/World_War_I" title="World War I">World War I</a></li> <li><a href="/wiki/Cryptography" title="Cryptography">Cryptography</a></li> <li><a href="/wiki/History_of_cryptography" title="History of cryptography">History of cryptography</a></li> <li><a href="/wiki/World_War_II_cryptography" title="World War II cryptography">World War II cryptography</a></li> <li><a href="/wiki/Japanese_cryptology_from_the_1500s_to_Meiji" title="Japanese cryptology from the 1500s to Meiji">Japanese cryptology from the 1500s to Meiji</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=World_War_I_cryptography&action=edit&section=7" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFWalker2014" class="citation news cs1">Walker, Julian (2014-07-23). <a rel="nofollow" class="external text" href="https://www.theguardian.com/education/2014/jul/23/first-world-war-slang-glossary">"Trench talk: a guide to first world war slang"</a>. <i>The Guardian</i>. <a href="/wiki/ISSN_(identifier)" class="mw-redirect" title="ISSN (identifier)">ISSN</a> <a rel="nofollow" class="external text" href="https://search.worldcat.org/issn/0261-3077">0261-3077</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2019-04-17</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Guardian&rft.atitle=Trench+talk%3A+a+guide+to+first+world+war+slang&rft.date=2014-07-23&rft.issn=0261-3077&rft.aulast=Walker&rft.aufirst=Julian&rft_id=https%3A%2F%2Fwww.theguardian.com%2Feducation%2F2014%2Fjul%2F23%2Ffirst-world-war-slang-glossary&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWorld+War+I+cryptography" class="Z3988"></span></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-2">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLerner" class="citation web cs1">Lerner, Adrienne. <a rel="nofollow" class="external text" href="http://www.faqs.org/espionage/Vo-Z/World-War-I.html">"World War I"</a>. <i>Espionage Information: Encyclopedia of Espionage, Intelligence, and Security</i>. Advameg, Inc<span class="reference-accessdate">. Retrieved <span class="nowrap">27 March</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Espionage+Information%3A+Encyclopedia+of+Espionage%2C+Intelligence%2C+and+Security&rft.atitle=World+War+I&rft.aulast=Lerner&rft.aufirst=Adrienne&rft_id=http%3A%2F%2Fwww.faqs.org%2Fespionage%2FVo-Z%2FWorld-War-I.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWorld+War+I+cryptography" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFlicke" class="citation web cs1">Flicke, Wilhelm. <a rel="nofollow" class="external text" href="https://www.nsa.gov/portals/75/documents/news-features/declassified-documents/cryptologic-spectrum/beginnings_radio_intercept.pdf">"The Beginnings of Radio Intercept in World War I"</a> <span class="cs1-format">(PDF)</span>. <i>National Security Agency</i>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=National+Security+Agency&rft.atitle=The+Beginnings+of+Radio+Intercept+in+World+War+I&rft.aulast=Flicke&rft.aufirst=Wilhelm&rft_id=https%3A%2F%2Fwww.nsa.gov%2Fportals%2F75%2Fdocuments%2Fnews-features%2Fdeclassified-documents%2Fcryptologic-spectrum%2Fbeginnings_radio_intercept.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWorld+War+I+cryptography" class="Z3988"></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-4">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKahn1967" class="citation book cs1">Kahn, David (1967). <i>The Codebreakers</i>. Scribner.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Codebreakers&rft.pub=Scribner&rft.date=1967&rft.aulast=Kahn&rft.aufirst=David&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWorld+War+I+cryptography" class="Z3988"></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><b><a href="#cite_ref-5">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFFriedman1977" class="citation book cs1">Friedman, William (1977). <i>Solving German Codes in World War I</i>. Aegean Park Press.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Solving+German+Codes+in+World+War+I&rft.pub=Aegean+Park+Press&rft.date=1977&rft.aulast=Friedman&rft.aufirst=William&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWorld+War+I+cryptography" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKahn1982" class="citation journal cs1">Kahn, David (1982). "In Memoriam: Georges-Jean Painvain". <i>Cryptologia</i>. <b>6</b> (2): 120–127. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1080%2F0161-118291856939">10.1080/0161-118291856939</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Cryptologia&rft.atitle=In+Memoriam%3A+Georges-Jean+Painvain&rft.volume=6&rft.issue=2&rft.pages=120-127&rft.date=1982&rft_id=info%3Adoi%2F10.1080%2F0161-118291856939&rft.aulast=Kahn&rft.aufirst=David&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWorld+War+I+cryptography" class="Z3988"></span></span> </li> <li id="cite_note-Codebreakers-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-Codebreakers_7-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKahn1996" class="citation book cs1">Kahn, David (1996). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=SEH_rHkgaogC&pg=PA352"><i>The Codebreakers: the Story of Secret Writing</i></a>. New York: Scribner. p. 352. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-684-83130-9" title="Special:BookSources/0-684-83130-9"><bdi>0-684-83130-9</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Codebreakers%3A+the+Story+of+Secret+Writing&rft.place=New+York&rft.pages=352&rft.pub=Scribner&rft.date=1996&rft.isbn=0-684-83130-9&rft.aulast=Kahn&rft.aufirst=David&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DSEH_rHkgaogC%26pg%3DPA352&rfr_id=info%3Asid%2Fen.wikipedia.org%3AWorld+War+I+cryptography" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=World_War_I_cryptography&action=edit&section=8" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a class="external text" href="https://ftl.toolforge.org/cgi-bin/ftl?st=wp&su=World+War+I+cryptography&library=OLBP">Online books</a>, and library resources <a class="external text" href="https://ftl.toolforge.org/cgi-bin/ftl?st=wp&su=World+War+I+cryptography">in your library</a> and <a class="external text" href="https://ftl.toolforge.org/cgi-bin/ftl?st=wp&su=World+War+I+cryptography&library=0CHOOSE0">in other libraries</a> about World War I cryptography</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline 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.navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="World_War_I" style=";wide;padding:3px"><table class="nowraplinks hlist mw-collapsible mw-collapsed navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2" style="background-color:#C3D6EF;color:inherit;"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:World_War_I" title="Template:World War I"><abbr title="View this template" style="color:inherit">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:World_War_I" title="Template talk:World War I"><abbr title="Discuss this template" style="color:inherit">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:World_War_I" title="Special:EditPage/Template:World War I"><abbr title="Edit this template" style="color:inherit">e</abbr></a></li></ul></div><div id="World_War_I" style="font-size:114%;margin:0 4em"><a href="/wiki/World_War_I" title="World War I">World War I</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2" style="background-color:#DCDCDC;color:inherit;"><div> <ul><li><a href="/wiki/Outline_of_World_War_I" title="Outline of World War I">Outline</a></li> <li><a href="/wiki/List_of_military_engagements_of_World_War_I" title="List of military engagements of World War I">Military engagements</a></li> <li><a href="/wiki/Aftermath_of_World_War_I" title="Aftermath of World War I">Aftermath</a></li> <li><a href="/wiki/Economic_history_of_World_War_I" title="Economic history of World War I">Economic history</a></li> <li><a href="/wiki/Role_of_geography_in_World_War_I" title="Role of geography in World War I">Geography</a></li> <li><a href="/wiki/Historiography_of_World_War_I" title="Historiography of World War I">Historiography</a></li> <li><a href="/wiki/Home_front_during_World_War_I" title="Home front during World War I">Home fronts</a></li> <li><a href="/wiki/World_War_I_memorials" title="World War I memorials">Memorials</a></li> <li><a href="/wiki/Opposition_to_World_War_I" title="Opposition to World War I">Opposition</a></li> <li><a href="/wiki/World_War_I_in_popular_culture" title="World War I in popular culture">Popular culture</a></li> <li><a href="/wiki/Propaganda_in_World_War_I" title="Propaganda in World War I">Propaganda</a></li> <li><a href="/wiki/List_of_World_War_I_puppet_states" title="List of World War I puppet states">Puppet states</a></li> <li><a href="/wiki/Technology_during_World_War_I" title="Technology during World War I">Technology</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;text-align:left;">Theatres</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0;;wide"><tbody><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/European_theatre_of_World_War_I" title="European theatre of World War I">European</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Balkans_theatre" title="Balkans theatre">Balkans</a> <ul><li><a href="/wiki/Serbian_campaign" title="Serbian campaign">Serbia</a></li></ul></li> <li><a href="/wiki/Western_Front_(World_War_I)" title="Western Front (World War I)">Western Front</a></li> <li><a href="/wiki/Eastern_Front_(World_War_I)" title="Eastern Front (World War I)">Eastern Front</a> <ul><li><a href="/wiki/Romania_in_World_War_I" title="Romania in World War I">Romania</a></li></ul></li> <li><a href="/wiki/Italian_front_(World_War_I)" title="Italian front (World War I)">Italian Front</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/Middle_Eastern_theatre_of_World_War_I" title="Middle Eastern theatre of World War I">Middle Eastern</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Gallipoli_campaign" title="Gallipoli campaign">Gallipoli</a></li> <li><a href="/wiki/Sinai_and_Palestine_campaign" title="Sinai and Palestine campaign">Sinai and Palestine</a></li> <li><a href="/wiki/Caucasus_campaign" title="Caucasus campaign">Caucasus</a></li> <li><a href="/wiki/Persian_campaign_(World_War_I)" title="Persian campaign (World War I)">Persia</a></li> <li><a href="/wiki/Mesopotamian_campaign" title="Mesopotamian campaign">Mesopotamia</a></li> <li><a href="/wiki/Arab_Revolt" title="Arab Revolt">Hejaz & Levant</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/African_theatre_of_World_War_I" title="African theatre of World War I">African</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/South_West_Africa_campaign" title="South West Africa campaign">South West</a></li> <li><a href="/wiki/East_African_campaign_(World_War_I)" title="East African campaign (World War I)">East</a></li> <li><a href="/wiki/Kamerun_campaign" title="Kamerun campaign">Kamerun</a></li> <li><a href="/wiki/Togoland_campaign" title="Togoland campaign">Togoland</a></li> <li><a href="/wiki/Military_operations_in_North_Africa_during_World_War_I" title="Military operations in North Africa during World War I">North</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/Asian_and_Pacific_theatre_of_World_War_I" title="Asian and Pacific theatre of World War I">Asian and Pacific</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Siege_of_Tsingtao" title="Siege of Tsingtao">Tsingtao</a></li> <li><a href="/wiki/Occupation_of_German_Samoa" title="Occupation of German Samoa">German Samoa</a></li> <li><a href="/wiki/Australian_occupation_of_German_New_Guinea" class="mw-redirect" title="Australian occupation of German New Guinea">German New Guinea</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/Naval_warfare_of_World_War_I" title="Naval warfare of World War I">Naval warfare</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/U-boat_campaign" title="U-boat campaign">U-boat campaign</a> <ul><li><a href="/wiki/Atlantic_U-boat_campaign_of_World_War_I" title="Atlantic U-boat campaign of World War I">North Atlantic</a></li></ul></li> <li><a href="/wiki/Naval_warfare_in_the_Mediterranean_during_World_War_I" title="Naval warfare in the Mediterranean during World War I">Mediterranean</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;text-align:left;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Principal<br />participants</div></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0;;wide"><tbody><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/Allies_of_World_War_I" title="Allies of World War I">Entente Powers</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Allied_leaders_of_World_War_I" title="Allied leaders of World War I">Leaders</a></li> <li><a href="/wiki/Belgium_in_World_War_I" title="Belgium in World War I">Belgium</a></li> <li><a href="/wiki/Brazil_during_World_War_I" title="Brazil during World War I">Brazil</a></li> <li><a href="/wiki/China_during_World_War_I" title="China during World War I">China</a></li> <li><a href="/wiki/French_Army_in_World_War_I" title="French Army in World War I">France</a> <ul><li><a href="/wiki/French_colonial_empire" title="French colonial empire">French Empire</a></li></ul></li> <li><a href="/wiki/Greece_during_World_War_I" title="Greece during World War I">Greece</a></li> <li><a href="/wiki/Kingdom_of_Hejaz" title="Kingdom of Hejaz">Hejaz</a></li> <li><a href="/wiki/Military_history_of_Italy_during_World_War_I" title="Military history of Italy during World War I">Italy</a></li> <li><a href="/wiki/Japan_during_World_War_I" title="Japan during World War I">Japan</a> <ul><li><a href="/wiki/Empire_of_Japan" title="Empire of Japan">Empire of Japan</a></li></ul></li> <li><a href="/wiki/History_of_Montenegro#World_War_I" title="History of Montenegro">Montenegro</a></li> <li><a href="/wiki/Portugal_during_World_War_I" title="Portugal during World War I">Portuguese Empire</a></li> <li><a href="/wiki/Romania_in_World_War_I" title="Romania in World War I">Romania</a></li> <li><a href="/wiki/Russia_in_the_First_World_War" title="Russia in the First World War">Russia</a> <ul><li><a href="/wiki/History_of_Russia_(1894%E2%80%931917)#Russia_at_war,_1914–1916" title="History of Russia (1894–1917)">Russian Empire</a></li> <li><a href="/wiki/Russian_Republic" title="Russian Republic">Russian Republic</a></li></ul></li> <li><a href="/wiki/History_of_Serbia#Serbia_in_World_War_I_(1914–1918)" title="History of Serbia">Serbia</a></li> <li><a href="/wiki/Siam_in_World_War_I" title="Siam in World War I">Siam</a></li> <li><a href="/wiki/History_of_the_United_Kingdom_during_the_First_World_War" title="History of the United Kingdom during the First World War">United Kingdom</a> <ul><li><a href="/wiki/British_Empire" title="British Empire">British Empire</a></li></ul></li> <li><a href="/wiki/United_States_in_World_War_I" title="United States in World War I">United States</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/Central_Powers" title="Central Powers">Central Powers</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Leaders_of_the_Central_Powers_of_World_War_I" title="Leaders of the Central Powers of World War I">Leaders</a></li> <li><a href="/wiki/German_Empire" title="German Empire">Germany</a></li> <li><a href="/wiki/History_of_Austria-Hungary_during_World_War_I" title="History of Austria-Hungary during World War I">Austria-Hungary</a></li> <li><a href="/wiki/Ottoman_Empire_in_World_War_I" title="Ottoman Empire in World War I">Ottoman Empire</a></li> <li><a href="/wiki/Bulgaria_during_World_War_I" title="Bulgaria during World War I">Bulgaria</a></li> <li><a href="/wiki/Senussi_Campaign" class="mw-redirect" title="Senussi Campaign">Senussi</a></li> <li><a href="/wiki/Maritz_Rebellion" class="mw-redirect" title="Maritz Rebellion">South African Republic</a></li> <li><a href="/wiki/Invasion_of_Darfur" title="Invasion of Darfur">Darfur</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;text-align:left;"><a href="/wiki/Timeline_of_World_War_I" title="Timeline of World War I">Timeline</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0;;wide"><tbody><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;">Pre-War conflicts</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Franco-Prussian_War" title="Franco-Prussian War">Franco-Prussian War</a> (1870–71)</li> <li><a href="/wiki/Scramble_for_Africa" title="Scramble for Africa">Scramble for Africa</a> (1880–1914)</li> <li><a href="/wiki/Russo-Japanese_War" title="Russo-Japanese War">Russo-Japanese War</a> (1905)</li> <li><a href="/wiki/First_Moroccan_Crisis" title="First Moroccan Crisis">Tangier Crisis</a> (1905–06)</li> <li><a href="/wiki/Bosnian_Crisis" title="Bosnian Crisis">Bosnian Crisis</a> (1908–09)</li> <li><a href="/wiki/Agadir_Crisis" title="Agadir Crisis">Agadir Crisis</a> (1911)</li> <li><a href="/wiki/Italo-Turkish_War" title="Italo-Turkish War">Italo-Turkish War</a> (1911–12)</li> <li><a href="/wiki/First_Balkan_War" title="First Balkan War">First Balkan War</a> (1912–13)</li> <li><a href="/wiki/Second_Balkan_War" title="Second Balkan War">Second Balkan War</a> (1913)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;">Prelude</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Causes_of_World_War_I" title="Causes of World War I">Origins</a> <ul><li><a href="/wiki/Historiography_of_the_causes_of_World_War_I" title="Historiography of the causes of World War I">Historiography</a></li></ul></li> <li><a href="/wiki/Assassination_of_Archduke_Franz_Ferdinand" title="Assassination of Archduke Franz Ferdinand">Sarajevo assassination</a></li> <li><a href="/wiki/Anti-Serb_riots_in_Sarajevo" title="Anti-Serb riots in Sarajevo">Anti-Serb riots in Sarajevo</a></li> <li><a href="/wiki/July_Crisis" title="July Crisis">July Crisis</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;">1914</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/German_invasion_of_Belgium_(1914)" title="German invasion of Belgium (1914)">German invasion of Belgium</a></li> <li><a href="/wiki/Battle_of_the_Frontiers" title="Battle of the Frontiers">Battle of the Frontiers</a></li> <li><a href="/wiki/Battle_of_Cer" title="Battle of Cer">Battle of Cer</a></li> <li><a href="/wiki/Battle_of_Galicia" title="Battle of Galicia">Battle of Galicia</a></li> <li><a href="/wiki/Russian_invasion_of_East_Prussia_(1914)" title="Russian invasion of East Prussia (1914)">Russian invasion of East Prussia</a></li> <li><a href="/wiki/Battle_of_Tannenberg" title="Battle of Tannenberg">Battle of Tannenberg</a></li> <li><a href="/wiki/Siege_of_Tsingtao" title="Siege of Tsingtao">Siege of Tsingtao</a></li> <li><a href="/wiki/First_Battle_of_the_Masurian_Lakes" title="First Battle of the Masurian Lakes">First Battle of the Masurian Lakes</a></li> <li><a href="/wiki/Battle_of_Grand_Couronn%C3%A9" title="Battle of Grand Couronné">Battle of Grand Couronné</a></li> <li><a href="/wiki/First_Battle_of_the_Marne" title="First Battle of the Marne">First Battle of the Marne</a></li> <li><a href="/wiki/Siege_of_Przemy%C5%9Bl" title="Siege of Przemyśl">Siege of Przemyśl</a></li> <li><a href="/wiki/Race_to_the_Sea" title="Race to the Sea">Race to the Sea</a></li> <li><a href="/wiki/First_Battle_of_Ypres" title="First Battle of Ypres">First Battle of Ypres</a></li> <li><a href="/wiki/Black_Sea_raid" title="Black Sea raid">Black Sea raid</a></li> <li><a href="/wiki/Battle_of_Kolubara" title="Battle of Kolubara">Battle of Kolubara</a></li> <li><a href="/wiki/Battle_of_Sarikamish" title="Battle of Sarikamish">Battle of Sarikamish</a></li> <li><a href="/wiki/Christmas_truce" title="Christmas truce">Christmas truce</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;">1915</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Second_Battle_of_the_Masurian_Lakes" title="Second Battle of the Masurian Lakes">Second Battle of the Masurian Lakes</a></li> <li><a href="/wiki/Battle_of_%C5%81om%C5%BCa" title="Battle of Łomża">Battle of Łomża</a></li> <li><a href="/wiki/Second_Battle_of_Ypres" title="Second Battle of Ypres">Second Battle of Ypres</a></li> <li><a href="/wiki/Sinking_of_the_RMS_Lusitania" title="Sinking of the RMS Lusitania">Sinking of the RMS <i>Lusitania</i></a></li> <li><a href="/wiki/Gallipoli_campaign" title="Gallipoli campaign">Battle of Gallipoli</a></li> <li><a href="/wiki/Second_Battle_of_Artois" title="Second Battle of Artois">Second Battle of Artois</a></li> <li><a href="/wiki/Battles_of_the_Isonzo" title="Battles of the Isonzo">Battles of the Isonzo</a></li> <li><a href="/wiki/Gorlice%E2%80%93Tarn%C3%B3w_offensive" title="Gorlice–Tarnów offensive">Gorlice–Tarnów offensive</a></li> <li><a href="/wiki/Great_Retreat_(Russia)" title="Great Retreat (Russia)">Great Retreat</a></li> <li><a href="/wiki/Bug%E2%80%93Narew_Offensive" title="Bug–Narew Offensive">Bug-Narew Offensive</a></li> <li><a href="/wiki/Siege_of_Novogeorgievsk" title="Siege of Novogeorgievsk">Siege of Novogeorgievsk</a></li> <li><a href="/wiki/Vistula%E2%80%93Bug_offensive" title="Vistula–Bug offensive">Vistula–Bug offensive</a></li> <li><a href="/wiki/Second_Battle_of_Champagne" title="Second Battle of Champagne">Second Battle of Champagne</a></li> <li><a href="/wiki/Kosovo_offensive_(1915)" title="Kosovo offensive (1915)">Kosovo offensive</a></li> <li><a href="/wiki/Siege_of_Kut" title="Siege of Kut">Siege of Kut</a></li> <li><a href="/wiki/Battle_of_Loos" title="Battle of Loos">Battle of Loos</a></li> <li><a href="/wiki/Battle_of_Robat_Karim" title="Battle of Robat Karim">Battle of Robat Karim</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;">1916</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Erzurum_offensive" title="Erzurum offensive">Erzurum offensive</a></li> <li><a href="/wiki/Battle_of_Verdun" title="Battle of Verdun">Battle of Verdun</a></li> <li><a href="/wiki/Lake_Naroch_offensive" title="Lake Naroch offensive">Lake Naroch offensive</a></li> <li><a href="/wiki/Battle_of_Asiago" title="Battle of Asiago">Battle of Asiago</a></li> <li><a href="/wiki/Battle_of_Jutland" title="Battle of Jutland">Battle of Jutland</a></li> <li><a href="/wiki/Battle_of_the_Somme" title="Battle of the Somme">Battle of the Somme</a> <ul><li><a href="/wiki/First_day_on_the_Somme" title="First day on the Somme">first day</a></li></ul></li> <li><a href="/wiki/Brusilov_offensive" title="Brusilov offensive">Brusilov offensive</a></li> <li><a href="/wiki/Baranovichi_offensive" title="Baranovichi offensive">Baranovichi offensive</a></li> <li><a href="/wiki/Battle_of_Romani" title="Battle of Romani">Battle of Romani</a></li> <li><a href="/wiki/Monastir_offensive" title="Monastir offensive">Monastir offensive</a></li> <li><a href="/wiki/Battle_of_Transylvania" title="Battle of Transylvania">Battle of Transylvania</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/Timeline_of_World_War_I_(1917%E2%80%931918)" title="Timeline of World War I (1917–1918)">1917</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Fall_of_Baghdad_(1917)" title="Fall of Baghdad (1917)">Capture of Baghdad</a></li> <li><a href="/wiki/February_Revolution" title="February Revolution">February Revolution</a></li> <li><a href="/wiki/Zimmermann_telegram" title="Zimmermann telegram">Zimmermann telegram</a></li> <li><a href="/wiki/Battle_of_Arras_(1917)" title="Battle of Arras (1917)">Second battle of Arras</a></li> <li><a href="/wiki/Second_battle_of_the_Aisne" class="mw-redirect" title="Second battle of the Aisne">Second battle of the Aisne</a></li> <li><a href="/wiki/Kerensky_offensive" title="Kerensky offensive">Kerensky offensive</a></li> <li><a href="/wiki/Battle_of_M%C4%83r%C4%83%C8%99ti" title="Battle of Mărăști">Battle of Mărăști</a></li> <li><a href="/wiki/Battle_of_Passchendaele" title="Battle of Passchendaele">Third Battle of Ypres (Passchendaele)</a></li> <li><a href="/wiki/Battle_of_M%C4%83r%C4%83%C8%99e%C8%99ti" title="Battle of Mărășești">Battle of Mărășești</a></li> <li><a href="/wiki/Third_Battle_of_Oituz" title="Third Battle of Oituz">Third Battle of Oituz</a></li> <li><a href="/wiki/Battle_of_Caporetto" title="Battle of Caporetto">Battle of Caporetto</a></li> <li><a href="/wiki/Southern_Palestine_offensive" title="Southern Palestine offensive">Southern Palestine offensive</a></li> <li><a href="/wiki/October_Revolution" title="October Revolution">October Revolution</a></li> <li><a href="/wiki/Battle_of_La_Malmaison" title="Battle of La Malmaison">Battle of La Malmaison</a></li> <li><a href="/wiki/Battle_of_Cambrai_(1917)" title="Battle of Cambrai (1917)">Battle of Cambrai</a></li> <li><a href="/wiki/Armistice_of_Foc%C8%99ani" title="Armistice of Focșani">Armistice of Focșani</a></li> <li><a href="/wiki/Armistice_between_Russia_and_the_Central_Powers" title="Armistice between Russia and the Central Powers">Armistice between Russia and the Central Powers</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/Timeline_of_World_War_I_(1917%E2%80%931918)" title="Timeline of World War I (1917–1918)">1918</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Operation_Faustschlag" title="Operation Faustschlag">Operation Faustschlag</a></li> <li><a href="/wiki/Treaty_of_Brest-Litovsk" title="Treaty of Brest-Litovsk">Treaty of Brest-Litovsk</a></li> <li><a href="/wiki/German_spring_offensive" title="German spring offensive">German spring offensive</a></li> <li><a href="/wiki/Zeebrugge_Raid" title="Zeebrugge Raid">Zeebrugge Raid</a></li> <li><a href="/wiki/Treaty_of_Bucharest_(1918)" title="Treaty of Bucharest (1918)">Treaty of Bucharest of 1918</a></li> <li><a href="/wiki/Battle_of_Goychay" title="Battle of Goychay">Battle of Goychay</a></li> <li><a href="/wiki/Second_Battle_of_the_Piave_River" title="Second Battle of the Piave River">Second Battle of the Piave River</a></li> <li><a href="/wiki/Second_Battle_of_the_Marne" title="Second Battle of the Marne">Second Battle of the Marne</a></li> <li><a href="/wiki/Hundred_Days_Offensive" title="Hundred Days Offensive">Hundred Days Offensive</a></li> <li><a href="/wiki/Vardar_offensive" title="Vardar offensive">Vardar offensive</a></li> <li><a href="/wiki/Battle_of_Megiddo_(1918)" title="Battle of Megiddo (1918)">Battle of Megiddo</a></li> <li><a href="/wiki/Third_Transjordan_attack" title="Third Transjordan attack">Third Transjordan attack</a></li> <li><a href="/wiki/Meuse%E2%80%93Argonne_offensive" title="Meuse–Argonne offensive">Meuse–Argonne offensive</a></li> <li><a href="/wiki/Battle_of_Vittorio_Veneto" title="Battle of Vittorio Veneto">Battle of Vittorio Veneto</a></li> <li><a href="/wiki/Armistice_of_Salonica" title="Armistice of Salonica">Armistice of Salonica</a></li> <li><a href="/wiki/Armistice_of_Mudros" title="Armistice of Mudros">Armistice of Mudros</a></li> <li><a href="/wiki/Armistice_of_Villa_Giusti" title="Armistice of Villa Giusti">Armistice of Villa Giusti</a></li> <li><a href="/wiki/Second_Romanian_campaign_of_World_War_I" title="Second Romanian campaign of World War I">Second Romanian campaign</a></li> <li><a href="/wiki/Armistice_of_11_November_1918" title="Armistice of 11 November 1918">Armistice with Germany</a></li> <li><a href="/wiki/Bollettino_della_Vittoria_Navale" title="Bollettino della Vittoria Navale">Naval Victory Bulletin</a></li> <li><a href="/wiki/Armistice_of_Belgrade" title="Armistice of Belgrade">Armistice of Belgrade</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;">Co-belligerent conflicts</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Somaliland_campaign" title="Somaliland campaign">Somaliland campaign</a> (1900–1920)</li> <li><a href="/wiki/Mexican_Revolution" title="Mexican Revolution">Mexican Revolution</a> (1910–1920)</li> <li><a href="/wiki/Maritz_rebellion" title="Maritz rebellion">Maritz rebellion</a> (1914–15)</li> <li><a href="/wiki/Muscat_rebellion" title="Muscat rebellion">Muscat rebellion</a> (1913–1920)</li> <li><a href="/wiki/Zaian_War" title="Zaian War">Zaian War</a> (1914–1921)</li> <li><a href="/wiki/Kurdish_rebellions_during_World_War_I" title="Kurdish rebellions during World War I">Kurdish rebellions</a> (1914–1917)</li> <li><a href="/wiki/Ovambo_Uprising" title="Ovambo Uprising">Ovambo Uprising</a> (1914–1917)</li> <li><a href="/wiki/Kelantan_rebellion" title="Kelantan rebellion">Kelantan rebellion</a> (1915)</li> <li><a href="/wiki/Senussi_campaign" title="Senussi campaign">Senussi campaign</a> (1915–1917)</li> <li><a href="/wiki/Volta-Bani_War" title="Volta-Bani War">Volta-Bani War</a> (1915–1917)</li> <li><a href="/wiki/National_Protection_War" title="National Protection War">National Protection War</a></li> <li><a href="/wiki/Arab_Revolt" title="Arab Revolt">Arab Revolt</a> (1916–1918)</li> <li><a href="/wiki/Central_Asian_revolt_of_1916" title="Central Asian revolt of 1916">Central Asian Revolt</a> (1916–17)</li> <li><a href="/wiki/Invasion_of_Darfur" title="Invasion of Darfur">Invasion of Darfur</a> (1916)</li> <li><a href="/wiki/Easter_Rising" title="Easter Rising">Easter Rising</a> (1916)</li> <li><a href="/wiki/Kaocen_revolt" title="Kaocen revolt">Kaocen revolt</a> (1916–17)</li> <li><a href="/wiki/Russian_Revolution" title="Russian Revolution">Russian Revolution</a> (1917)</li> <li><a href="/wiki/Finnish_Civil_War" title="Finnish Civil War">Finnish Civil War</a> (1918)</li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;">Post-War conflicts</th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Russian_Civil_War" title="Russian Civil War">Russian Civil War</a> (1917–1921)</li> <li><a href="/wiki/Ukrainian%E2%80%93Soviet_War" title="Ukrainian–Soviet War">Ukrainian–Soviet War</a> (1917–1921)</li> <li><a href="/wiki/Armenian%E2%80%93Azerbaijani_war_(1918%E2%80%931920)" title="Armenian–Azerbaijani war (1918–1920)">Armenian–Azerbaijani War</a> (1918–1920)</li> <li><a href="/wiki/Armeno-Georgian_War" title="Armeno-Georgian War">Armeno-Georgian War</a> (1918)</li> <li><a href="/wiki/German_Revolution_of_1918%E2%80%931919" class="mw-redirect" title="German Revolution of 1918–1919">German Revolution</a> (1918–19)</li> <li><a href="/wiki/Revolutions_and_interventions_in_Hungary_(1918%E2%80%931920)" title="Revolutions and interventions in Hungary (1918–1920)">Revolutions and interventions in Hungary</a> (1918–1920)</li> <li><a href="/wiki/Hungarian%E2%80%93Romanian_War" title="Hungarian–Romanian War">Hungarian–Romanian War</a> (1918–19)</li> <li><a href="/wiki/Greater_Poland_uprising_(1918%E2%80%931919)" title="Greater Poland uprising (1918–1919)">Greater Poland Uprising</a> (1918–19)</li> <li><a href="/wiki/Estonian_War_of_Independence" title="Estonian War of Independence">Estonian War of Independence</a> (1918–1920)</li> <li><a href="/wiki/Latvian_War_of_Independence" title="Latvian War of Independence">Latvian War of Independence</a> (1918–1920)</li> <li><a href="/wiki/Lithuanian_Wars_of_Independence" title="Lithuanian Wars of Independence">Lithuanian Wars of Independence</a> (1918–1920)</li> <li><a href="/wiki/Polish%E2%80%93Ukrainian_War" title="Polish–Ukrainian War">Polish–Ukrainian War</a> (1918–19)</li> <li><a href="/wiki/Third_Anglo-Afghan_War" title="Third Anglo-Afghan War">Third Anglo-Afghan War</a> (1919)</li> <li><a href="/wiki/1919_Egyptian_revolution" title="1919 Egyptian revolution">Egyptian Revolution</a> (1919)</li> <li><a href="/wiki/Polish%E2%80%93Lithuanian_War" title="Polish–Lithuanian War">Polish–Lithuanian War</a> (1919–1920)</li> <li><a href="/wiki/Polish%E2%80%93Soviet_War" title="Polish–Soviet War">Polish–Soviet War</a> (1919–1921)</li> <li><a href="/wiki/Irish_War_of_Independence" title="Irish War of Independence">Irish War of Independence</a> (1919–1921)</li> <li><a href="/wiki/Turkish_War_of_Independence" title="Turkish War of Independence">Turkish War of Independence</a> <ul><li><a href="/wiki/United_Kingdom_during_the_Turkish_War_of_Independence" title="United Kingdom during the Turkish War of Independence">Anglo-Turkish War</a> (1918–1923)</li> <li><a href="/wiki/Franco-Turkish_War" title="Franco-Turkish War">Franco-Turkish War</a> (1918–1921)</li> <li><a href="/wiki/Greco-Turkish_War_(1919%E2%80%931922)" title="Greco-Turkish War (1919–1922)">Greco-Turkish War</a> (1919–1922)</li> <li><a href="/wiki/Turkish%E2%80%93Armenian_War" title="Turkish–Armenian War">Turkish–Armenian War</a> (1920)</li></ul></li> <li><a href="/wiki/Iraqi_Revolt" title="Iraqi Revolt">Iraqi Revolt</a> (1920)</li> <li><a href="/wiki/Vlora_War" title="Vlora War">Vlora War</a> (1920)</li> <li><a href="/wiki/Franco-Syrian_War" title="Franco-Syrian War">Franco-Syrian War</a> (1920)</li> <li><a href="/wiki/Red_Army_invasion_of_Georgia" title="Red Army invasion of Georgia">Soviet–Georgian War</a> (1921)</li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;text-align:left;">Aspects</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0;;wide"><tbody><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;">Warfare</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Aviation_in_World_War_I" title="Aviation in World War I">Aviation</a> <ul><li><a href="/wiki/Strategic_bombing_during_World_War_I" title="Strategic bombing during World War I">Strategic bombing</a></li></ul></li> <li><a href="/wiki/Chemical_weapons_in_World_War_I" title="Chemical weapons in World War I">Chemical weapons</a></li> <li><a class="mw-selflink selflink">Cryptography</a></li> <li><a href="/wiki/Horses_in_World_War_I" title="Horses in World War I">Horses</a></li> <li><a href="/wiki/Logistics_in_World_War_I" title="Logistics in World War I">Logistics</a></li> <li><a href="/wiki/Naval_warfare_of_World_War_I" title="Naval warfare of World War I">Naval warfare</a> <ul><li><a href="/wiki/Convoys_in_World_War_I" title="Convoys in World War I">Convoy system</a></li></ul></li> <li><a href="/wiki/Trench_warfare" title="Trench warfare">Trench warfare</a></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0;;wide"><tbody><tr><th id="Conscription" scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;font-weight:normal;">Conscription</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/World_War_I_conscription_in_Australia" title="World War I conscription in Australia">Australia</a></li> <li><a href="/wiki/Conscription_Crisis_of_1917" title="Conscription Crisis of 1917">Canada</a></li> <li><a href="/wiki/Seferberlik" title="Seferberlik">Ottoman Empire</a></li> <li><a href="/wiki/Recruitment_to_the_British_Army_during_World_War_I" title="Recruitment to the British Army during World War I">United Kingdom</a> <ul><li><a href="/wiki/Conscription_Crisis_of_1918" title="Conscription Crisis of 1918">Ireland</a></li></ul></li> <li><a href="/wiki/Selective_Service_Act_of_1917" title="Selective Service Act of 1917">United States</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/World_War_I_casualties" title="World War I casualties">Casualties</a> /<br />Civilian impact</div></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li>British casualties <ul><li><a href="/wiki/List_of_British_parliamentarians_who_died_in_the_First_World_War" title="List of British parliamentarians who died in the First World War">Parliamentarians</a></li></ul></li> <li><a href="/wiki/Ottoman_casualties_of_World_War_I" title="Ottoman casualties of World War I">Ottoman casualties</a></li> <li>Sports <ul><li><a href="/wiki/List_of_international_rugby_union_players_killed_in_World_War_I" title="List of international rugby union players killed in World War I">Rugby</a></li> <li><a href="/wiki/List_of_Olympians_killed_in_World_War_I" title="List of Olympians killed in World War I">Olympians</a></li></ul></li></ul> </div><table class="nowraplinks navbox-subgroup" style="border-spacing:0;;wide"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;font-weight:normal;">Disease</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/1899%E2%80%931923_cholera_pandemic" title="1899–1923 cholera pandemic">1899–1923 cholera pandemic</a></li> <li><a href="/wiki/1915_typhus_and_relapsing_fever_epidemic_in_Serbia" title="1915 typhus and relapsing fever epidemic in Serbia">1915 typhus epidemic in Serbia</a></li> <li><a href="/wiki/Spanish_flu" title="Spanish flu">Spanish flu</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;font-weight:normal;">Occupations</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Austro-Hungarian_occupation_of_Serbia" title="Austro-Hungarian occupation of Serbia">Austro-Hungarian occupation of Serbia</a></li> <li>Bulgarian occupations <ul><li><a href="/wiki/Bulgarian_occupation_of_Albania" title="Bulgarian occupation of Albania">Albania</a></li> <li><a href="/wiki/Bulgarian_occupation_of_Serbia_(World_War_I)" title="Bulgarian occupation of Serbia (World War I)">Serbia</a></li></ul></li> <li>German occupations <ul><li><a href="/wiki/German_occupation_of_Belgium_during_World_War_I" title="German occupation of Belgium during World War I">Belgium</a></li> <li><a href="/wiki/German_occupation_of_Luxembourg_during_World_War_I" title="German occupation of Luxembourg during World War I">Luxembourg</a></li> <li><a href="/wiki/German_occupation_of_north-east_France_during_World_War_I" title="German occupation of north-east France during World War I">Northeast France</a></li> <li><i><a href="/wiki/Ober_Ost" title="Ober Ost">Ober Ost</a></i></li></ul></li> <li><a href="/wiki/Occupied_Enemy_Territory_Administration" title="Occupied Enemy Territory Administration">Occupied Enemy Territory Administration</a></li> <li>Russian occupations <ul><li><a href="/wiki/Russian_occupation_of_Eastern_Galicia_(1914%E2%80%931915)" title="Russian occupation of Eastern Galicia (1914–1915)">Eastern Galicia</a></li> <li><a href="/wiki/Occupation_of_Western_Armenia" title="Occupation of Western Armenia">Western Armenia</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/Prisoners_of_war_in_World_War_I" title="Prisoners of war in World War I">POWs</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Germans <ul><li><a href="/wiki/German_prisoners_of_war_in_the_United_States" title="German prisoners of war in the United States">in the United States</a></li></ul></li> <li><a href="/wiki/Italian_prisoners_of_war_in_World_War_I" title="Italian prisoners of war in World War I">Italians</a></li> <li>POW locations <ul><li><a href="/wiki/List_of_World_War_I_prisoner-of-war_camps_in_Canada" title="List of World War I prisoner-of-war camps in Canada">Canada</a></li> <li><a href="/wiki/World_War_I_prisoners_of_war_in_Germany" title="World War I prisoners of war in Germany">Germany</a> / <a href="/wiki/German_prisoner-of-war_camps_in_World_War_I" title="German prisoner-of-war camps in World War I">camps</a></li> <li><a href="/wiki/Prisoner_of_war_camps_in_Switzerland_during_World_War_I" title="Prisoner of war camps in Switzerland during World War I">Switzerland</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/Refugees_of_World_War_I" title="Refugees of World War I">Refugees</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Belgian refugees <ul><li><a href="/wiki/Belgian_refugees_in_the_Netherlands_during_the_First_World_War" title="Belgian refugees in the Netherlands during the First World War">Netherlands</a></li> <li><a href="/wiki/Belgian_refugees_in_Britain_during_the_First_World_War" title="Belgian refugees in Britain during the First World War">United Kingdom</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/War_crimes_in_World_War_I" title="War crimes in World War I">War crimes</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li>Allied blockades <ul><li><a href="/wiki/Blockade_of_the_Eastern_Mediterranean" title="Blockade of the Eastern Mediterranean">Eastern Mediterranean</a> <ul><li><a href="/wiki/Great_Famine_of_Mount_Lebanon" title="Great Famine of Mount Lebanon">Mount Lebanon famine</a></li></ul></li> <li><a href="/wiki/Blockade_of_Germany_(1914%E2%80%931919)" title="Blockade of Germany (1914–1919)">Germany</a></li></ul></li> <li><a href="/wiki/Deportations_from_East_Prussia_during_World_War_I" title="Deportations from East Prussia during World War I">Deportations from East Prussia</a></li> <li><a href="/wiki/Destruction_of_Kalisz" title="Destruction of Kalisz">Destruction of Kalisz</a></li> <li><a href="/wiki/Sack_of_Dinant" title="Sack of Dinant">Sack of Dinant</a></li> <li><a href="/wiki/Late_Ottoman_genocides" title="Late Ottoman genocides">Late Ottoman genocides</a> <ul><li><a href="/wiki/Armenian_genocide" title="Armenian genocide">Armenian genocide</a></li> <li><a href="/wiki/Sayfo" title="Sayfo">Assyrian genocide (Sayfo)</a></li> <li><a href="/wiki/Greek_genocide" title="Greek genocide">Pontic Greek genocide</a></li></ul></li> <li><a href="/wiki/Rape_of_Belgium" title="Rape of Belgium">Rape of Belgium</a></li> <li><a href="/wiki/Central_Asian_revolt_of_1916" title="Central Asian revolt of 1916">Urkun (Kyrgyzstan)</a></li> <li><a href="/wiki/Massacres_of_Albanians_in_World_War_I" title="Massacres of Albanians in World War I">Massacres of Albanians</a></li> <li><a href="/wiki/Ukrainian_Canadian_internment" title="Ukrainian Canadian internment">Ukrainian Canadian internment</a></li></ul> </div></td></tr></tbody></table><div> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Diplomatic_history_of_World_War_I" title="Diplomatic history of World War I">Diplomacy</a></div></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0;;wide"><tbody><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;">Entry into the war</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Austro-Hungarian_entry_into_World_War_I" title="Austro-Hungarian entry into World War I">Austria-Hungary</a></li> <li><a href="/wiki/French_entry_into_World_War_I" title="French entry into World War I">France</a></li> <li><a href="/wiki/German_entry_into_World_War_I" title="German entry into World War I">Germany</a></li> <li><a href="/wiki/Italian_entry_into_World_War_I" title="Italian entry into World War I">Italy</a></li> <li><a href="/wiki/Japanese_entry_into_World_War_I" title="Japanese entry into World War I">Japan</a></li> <li><a href="/wiki/Ottoman_entry_into_World_War_I" title="Ottoman entry into World War I">Ottoman Empire</a></li> <li><a href="/wiki/Russian_entry_into_World_War_I" title="Russian entry into World War I">Russia</a></li> <li><a href="/wiki/British_entry_into_World_War_I" title="British entry into World War I">United Kingdom</a></li> <li><a href="/wiki/American_entry_into_World_War_I" title="American entry into World War I">United States</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><a href="/wiki/Declarations_of_war_during_World_War_I" title="Declarations of war during World War I">Declarations of war</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/To_my_peoples" title="To my peoples">Austria-Hungary against Serbia</a></li> <li><a href="/wiki/United_Kingdom_declaration_of_war_upon_Germany_(1914)" title="United Kingdom declaration of war upon Germany (1914)">UK against Germany</a></li> <li><a href="/wiki/Ottoman_Empire_in_World_War_I#Declaration_of_jihad" title="Ottoman Empire in World War I">Ottomans against the Triple Entente</a></li> <li><a href="/wiki/United_States_declaration_of_war_on_Germany_(1917)" title="United States declaration of war on Germany (1917)">USA against Germany</a></li> <li><a href="/wiki/United_States_declaration_of_war_on_Austria-Hungary" title="United States declaration of war on Austria-Hungary">USA against Austria-Hungary</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;">Agreements</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Constantinople_Agreement" title="Constantinople Agreement">Constantinople Agreement</a></li> <li><a href="/wiki/Treaty_of_London_(1915)" title="Treaty of London (1915)">Treaty of London</a></li> <li><a href="/wiki/Damascus_Protocol" title="Damascus Protocol">Damascus Protocol</a></li> <li><a href="/wiki/Bulgaria%E2%80%93Germany_treaty_(1915)" title="Bulgaria–Germany treaty (1915)">Bulgaria–Germany treaty</a></li> <li><a href="/wiki/Treaty_of_Darin" title="Treaty of Darin">Treaty of Darin</a></li> <li><a href="/wiki/Sykes%E2%80%93Picot_Agreement" title="Sykes–Picot Agreement">Sykes–Picot Agreement</a></li> <li><a href="/wiki/Sazonov%E2%80%93Pal%C3%A9ologue_Agreement" title="Sazonov–Paléologue Agreement">Sazonov–Paléologue Agreement</a></li> <li><a href="/wiki/Paris_Economy_Pact" title="Paris Economy Pact">Paris Economy Pact</a></li> <li><a href="/wiki/Treaty_of_Bucharest_(1916)" title="Treaty of Bucharest (1916)">Treaty of Bucharest</a></li> <li><a href="/wiki/Agreement_of_Saint-Jean-de-Maurienne" title="Agreement of Saint-Jean-de-Maurienne">Agreement of Saint-Jean-de-Maurienne</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Peace treaties</div></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Modus_vivendi_of_Acroma" title="Modus vivendi of Acroma">Modus vivendi of Acroma</a></li> <li>Treaties of Brest-Litovsk <ul><li><a href="/wiki/Treaty_of_Brest-Litovsk" title="Treaty of Brest-Litovsk">Russia–Central Powers</a></li> <li><a href="/wiki/Treaty_of_Brest-Litovsk_(Ukraine%E2%80%93Central_Powers)" title="Treaty of Brest-Litovsk (Ukraine–Central Powers)">Ukraine–Central Powers</a></li></ul></li> <li><a href="/wiki/Treaty_of_Bucharest_(1918)" title="Treaty of Bucharest (1918)">Treaty of Bucharest</a></li> <li><a href="/wiki/Paris_Peace_Conference_(1919%E2%80%931920)" title="Paris Peace Conference (1919–1920)">Paris Peace Conference</a> <ul><li><a href="/wiki/Treaty_of_Versailles" title="Treaty of Versailles">Treaty of Versailles</a></li> <li><a href="/wiki/Treaty_of_Saint-Germain-en-Laye_(1919)" title="Treaty of Saint-Germain-en-Laye (1919)">Treaty of St. Germain</a></li> <li><a href="/wiki/Treaty_of_Neuilly-sur-Seine" title="Treaty of Neuilly-sur-Seine">Treaty of Neuilly</a></li> <li><a href="/wiki/Treaty_of_Trianon" title="Treaty of Trianon">Treaty of Trianon</a></li> <li><a href="/wiki/Treaty_of_S%C3%A8vres" title="Treaty of Sèvres">Treaty of Sèvres</a></li></ul></li> <li><a href="/wiki/Treaty_of_Lausanne" title="Treaty of Lausanne">Treaty of Lausanne</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:8em;background-color:#DCDCDC;color:inherit;font-weight:normal;">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Arrest_of_a_Suspect_in_Sarajevo" title="Arrest of a Suspect in Sarajevo">Arrest of a Suspect in Sarajevo</a></i></li> <li><a href="/wiki/Mutilated_victory" title="Mutilated victory">Mutilated victory</a></li> <li><i><a href="/wiki/The_Golden_Virgin" title="The Golden Virgin">The Golden Virgin</a></i></li> <li><i><a href="/wiki/They_shall_not_pass" title="They shall not pass">They shall not pass</a></i></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td 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