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Weapons of World War I | Britannica

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Please refer to the appropriate style manual or other sources if you have any questions. </div> <div class="label mt-20 mb-10">Select Citation Style</div> <select class="js-citation-format-select form-select"> <option selected value="mla">MLA</option> <option value="apa">APA</option> <option value="chicago">Chicago Manual of Style</option> </select> <div class="citation font-serif border rounded p-15 mt-20" data-authors="Michael Ray" data-title="Weapons of World War I" data-published-date="26 Oct. 2018" data-url="https://www.britannica.com/list/weapons-of-world-war-i" > <div class="citation-text"></div> </div> <button class="js-copy-citation-button mt-20 btn btn-xs btn-outline-blue border shadow-sm pr-10" > <em class="material-icons md-icon ml-n10 my-n5 mr-5" data-icon="file_copy"></em> <span class="js-citation-status-text">Copy Citation</span> </button> </div> </div> </div> <div> <button class="js-share-modal-button js-modal gtm-topic-tool btn btn-xs btn-outline-blue border shadow-sm pr-10" data-modal=".md-share-modal"> <em class="material-icons md-icon ml-n10 my-n5 mr-5" data-icon="share"></em> Share </button> <div class="md-share-modal size-lg d-none qa-share-modal"> <div class="md-modal-body"> <div class="h2 font-serif d-flex align-items-center pb-15 border-bottom"> <em class="material-icons text-blue mr-10" data-icon="share"></em> Share </div> <div class="label my-20">Share to social media</div> <div class="md-social-toolbar-circle d-flex align-items-start inverted" data-value="share" title="Weapons of World War I" data-url="https://www.britannica.com/list/weapons-of-world-war-i" > <a class="social-icon facebook justify-content-center d-flex align-items-center align-self-center" data-provider="facebook" href="https://www.facebook.com/BRITANNICA/" target="_blank" rel="noopener"><span>Facebook</span></a> <a class="social-icon x justify-content-center d-flex align-items-center align-self-center" data-provider="x" href="https://x.com/britannica" target="_blank" rel="noopener"><span>X</span></a> </div> <div class="label pt-20 mt-20 mb-5 border-top">URL</div> <a class="font-serif text-truncate d-inline-block" href="https://www.britannica.com/list/weapons-of-world-war-i">https://www.britannica.com/list/weapons-of-world-war-i</a> </div> </div> </div> </div> <div class="md-byline module-spacing font-14"> <div class="font-serif font-12"> <span class="written-by text-gray-700"> Written by </span> <div class="editor-popover popover p-0"> <a class="d-block p-20 qa-editor-popup gtm-byline font-12 byline-contributor" href="/editor/Michael-Ray/6392" > <div class="editor-title font-16 font-weight-bold">Michael Ray</div> <div class="editor-description font-12 font-serif mt-5 clamp-description text-black">Michael Ray is an assistant managing editor who has worked at Britannica since 2003. In addition to leading the Geography and History team, he oversees coverage of European history and military affairs....</div> </a> <div data-popper-arrow></div> </div> <span class="btn btn-link editor-link p-0 qa-byline-link gtm-byline font-12 byline-contributor text-decoration-underline"> Michael Ray</span></div> <div class="font-serif font-12 text-gray-700"> <span class="qa-fact-checked-by">Fact-checked by</span> <div class="editor-popover popover p-0"> <a class="d-block p-20 qa-editor-popup font-12" href="/editor/The-Editors-of-Encyclopaedia-Britannica/4419" > <div class="editor-title font-16 font-weight-bold">The Editors of Encyclopaedia Britannica</div> <div class="editor-description font-12 font-serif mt-5 text-black">Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.</div> </a> <div data-popper-arrow></div> </div> <span class="btn btn-link editor-link p-0 qa-byline-link font-12 "> The Editors of Encyclopaedia Britannica</span></div></div> </div> <article class="topic-content content"><ul class="list-unstyled md-mendel-list"><li><h2>Depth charge</h2><div><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media" data-type="image"><a href="https://cdn.britannica.com/03/200603-050-E923072E/ship-British-depth-charges-vicinity-German-submarine.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*236967"><img src="https://cdn.britannica.com/03/200603-050-E923072E/ship-British-depth-charges-vicinity-German-submarine.jpg?w=1000" alt="German activity at sea; another depth mine explodes; no year date on photo. (World War I)" data-width="1346" data-height="1600" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif "><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/03/200603-050-E923072E/ship-British-depth-charges-vicinity-German-submarine.jpg" data-href="*236967">depth charge</a><span>British ship laying depth charges in the vicinity of a submerged German submarine during World War I.</span></span></div><cite class="credit d-block mt-5">Encyclopædia Britannica, Inc.</cite></figcaption></figure><!--[BP]--><p class="topic-paragraph"><a href="https://www.britannica.com/technology/depth-charge" class="md-crosslink " data-show-preview="true">Depth charges</a> were first developed by the Royal Navy during <a href="https://www.britannica.com/event/World-War-I" class="md-crosslink " data-show-preview="true">World War I</a> to combat German submarines.</p><!--[P]--><!--[MOD]--><span class="MOD"></span></div><!--[LIST-ITEM-1]--><span class="LIST-ITEM-1"></span></li><li><h2>Military aircraft</h2><div><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media" data-type="image"><a href="https://cdn.britannica.com/44/200644-050-9C6BC631/airfield-British-Hendon-London-England-World-War.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*236974"><img src="https://cdn.britannica.com/44/200644-050-9C6BC631/airfield-British-Hendon-London-England-World-War.jpg?w=1000" alt="England&#39;s army planes at Hendon, England, inspected by Major A.D. Carter; undated photo. (World War I)" data-width="1600" data-height="1204" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif "><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/44/200644-050-9C6BC631/airfield-British-Hendon-London-England-World-War.jpg" data-href="*236974">military aircraft</a><span>British airfield at Hendon, outside London, England, during World War I.</span></span></div><cite class="credit d-block mt-5">Encyclopædia Britannica, Inc.</cite></figcaption></figure><!--[BP]--><p class="topic-paragraph">World War I was a crucible for <a href="https://www.britannica.com/technology/military-aircraft" class="md-crosslink " data-show-preview="true">military aircraft</a> development. Between 1914 and 1918, planes advanced from barely airworthy craft to effective weapons platforms.</p><!--[P]--><!--[MOD]--><span class="MOD"></span></div><!--[LIST-ITEM-2]--><span class="LIST-ITEM-2"></span></li><li><h2>Rifle</h2><div><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media" data-type="image"><a href="https://cdn.britannica.com/43/200643-050-93044A76/infantryman-Serbian-Greece-Salonika-April-1916.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*237004"><img src="https://cdn.britannica.com/43/200643-050-93044A76/infantryman-Serbian-Greece-Salonika-April-1916.jpg?w=1000" alt="The newly equipped Serbian army arriving at 4th Coy. With British boots and French rifles, near Salonika, Greece; April 1916. (World War I)" data-width="1304" data-height="1600" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif "><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/43/200643-050-93044A76/infantryman-Serbian-Greece-Salonika-April-1916.jpg" data-href="*237004">World War I</a><span>Serbian infantryman near Salonika (now Thessaloníki), Greece, April 1916.</span></span></div><cite class="credit d-block mt-5">Encyclopædia Britannica, Inc.</cite></figcaption></figure><!--[BP]--><p class="topic-paragraph">Infantry weapons underwent a massive change in the late 19th century, as <a href="https://www.britannica.com/technology/repeating-rifle" class="md-crosslink " data-show-preview="true">repeating rifles</a> entered widespread use. The World War I infantryman could produce a volume of fire that dwarfed that of his mid-19th-century predecessors.</p><!--[P]--><!--[MOD]--><span class="MOD"></span></div><!--[LIST-ITEM-3]--><span class="LIST-ITEM-3"></span></li><li><h2>Zeppelin</h2><div><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media" data-type="image"><a href="https://cdn.britannica.com/38/104338-050-DF135929/zeppelin-harbour-Kiel-Ger-maneuvers-World-War.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*108954"><img src="https://cdn.britannica.com/38/104338-050-DF135929/zeppelin-harbour-Kiel-Ger-maneuvers-World-War.jpg?w=1000" alt="German Zeppelin flies over Kiel Bay, Germany during a World War I manuever." data-width="1138" data-height="834" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif "><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/38/104338-050-DF135929/zeppelin-harbour-Kiel-Ger-maneuvers-World-War.jpg" data-href="*108954">zeppelin</a><span>A zeppelin flying over the harbour at Kiel, Germany, on maneuvers during World War I.</span></span></div><cite class="credit d-block mt-5">Encyclopædia Britannica, Inc.</cite></figcaption></figure><!--[BP]--><p class="topic-paragraph">German airships achieved moderate success in long-range bombing operations, as <a href="https://www.britannica.com/technology/zeppelin" class="md-crosslink " data-show-preview="true">Zeppelins</a> could attain higher altitudes than the airplanes of the era.</p><!--[P]--><!--[MOD]--><span class="MOD"></span></div><!--[LIST-ITEM-4]--><span class="LIST-ITEM-4"></span></li><li><h2>Chemical weapons</h2><div><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media" data-type="image"><a href="https://cdn.britannica.com/29/201029-050-DAD0EE7A/front-lines-soldiers-region-gas-mask-Alsace.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*237012"><img src="https://cdn.britannica.com/29/201029-050-DAD0EE7A/front-lines-soldiers-region-gas-mask-Alsace.jpg?w=1000" alt="French front. In Alsace, in a village close the border and exposed to bombardment. Soldiers demonstrating to the women how they can adjust on themselves the masks to guard against the murderous gas. (World War I)" data-width="1600" data-height="1151" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif "><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/29/201029-050-DAD0EE7A/front-lines-soldiers-region-gas-mask-Alsace.jpg" data-href="*237012">chemical weapons in World War I</a><span>Soldiers demonstrating the proper wearing of a gas mask to civilians near the front lines in the French region of Alsace.</span></span></div><cite class="credit d-block mt-5">Encyclopædia Britannica, Inc.</cite></figcaption></figure><!--[BP]--><p class="topic-paragraph">Chemical weapons, such as <a href="https://www.britannica.com/technology/diphosgene" class="md-crosslink " data-show-preview="true">diphosgene</a> and <a href="https://www.britannica.com/science/mustard-gas" class="md-crosslink " data-show-preview="true">mustard gas</a>, were employed extensively on the <a href="https://www.britannica.com/event/Western-Front-World-War-I" class="md-crosslink " data-show-preview="true">Western Front</a>.</p><!--[P]--><!--[MOD]--><span class="MOD"></span></div><!--[LIST-ITEM-5]--><span class="LIST-ITEM-5"></span></li><li><h2>Artillery</h2><div><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media" data-type="image"><a href="https://cdn.britannica.com/24/201024-050-3D369E37/American-railway-gun-firing-projectiles-German-troop.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*236976"><img src="https://cdn.britannica.com/24/201024-050-3D369E37/American-railway-gun-firing-projectiles-German-troop.jpg?w=1000" alt="Fourteen-inch railway gun, manned by American coast artillerymen, sends its projectiles 20 miles away upon a German railway and troop movement center, such, at least, is the report of the airplane observer working in liaison with the gunners.(World War I)" data-width="1600" data-height="1248" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif "><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/24/201024-050-3D369E37/American-railway-gun-firing-projectiles-German-troop.jpg" data-href="*236976">World War I; artillery</a><span>American 14-inch railway gun firing projectiles at a German railway and troop movement center some 20 miles (32 km) away.</span></span></div><cite class="credit d-block mt-5">U.S. Signal Corps/National Archives, Washington, D.C.</cite></figcaption></figure><!--[BP]--><p class="topic-paragraph"><a href="https://www.britannica.com/technology/artillery" class="md-crosslink " data-show-preview="true">Artillery</a> literally shaped the battlefield in World War I. It ranged in size from the French 75-mm field gun to the massive 420-mm Big Bertha and the 210-mm Paris Gun.</p><!--[P]--><!--[MOD]--><span class="MOD"></span></div><!--[LIST-ITEM-6]--><span class="LIST-ITEM-6"></span></li><li><h2>Cavalry</h2><div><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media" data-type="image"><a href="https://cdn.britannica.com/74/196074-050-A43E4F7F/Members-Australian-4th-Light-Horse-Brigade-Giza.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*236988"><img src="https://cdn.britannica.com/74/196074-050-A43E4F7F/Members-Australian-4th-Light-Horse-Brigade-Giza.jpg?w=1000" alt="W.A.S. Dunlop and three other soldiers from the 4th Light Horse Brigade at Giza, Egypt, approximately 1915." data-width="970" data-height="756" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif "><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/74/196074-050-A43E4F7F/Members-Australian-4th-Light-Horse-Brigade-Giza.jpg" data-href="*236988">World War I</a><span>Members of the Australian 4th Light Horse Brigade at Giza, Egypt, during World War I.</span></span></div><cite class="credit d-block mt-5">National Library of Australia, nla.obj-148034768</cite></figcaption></figure><!--[BP]--><p class="topic-paragraph">Despite the advances in technology, <a href="https://www.britannica.com/topic/cavalry" class="md-crosslink " data-show-preview="true">cavalry</a> retained a significant role in World War I, and horses died by the millions in the conflict.</p><!--[P]--><!--[MOD]--><span class="MOD"></span></div><!--[LIST-ITEM-7]--><span class="LIST-ITEM-7"></span></li><li><h2>Battleship</h2><div><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media" data-type="image"><a href="https://cdn.britannica.com/14/60714-004-3363E418/HMS-Orion-Royal-Navy-power-guns-ship-1922.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*4030"><img src="https://cdn.britannica.com/14/60714-004-3363E418/HMS-Orion-Royal-Navy-power-guns-ship-1922.jpg?w=1000" alt="Figure 30: HMS Orion, super dreadnought battleship of the Royal Navy. Heavier than HMS Dreadnought but just as fast, this ship mounted 10 13.5-inch guns of greater armour-piercing power in five turrets along the centreline of the vessel.The Orion was pre" data-width="550" data-height="233" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif "><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/14/60714-004-3363E418/HMS-Orion-Royal-Navy-power-guns-ship-1922.jpg" data-href="*4030">HMS <em>Orion</em>; dreadnought</a><span>HMS <em>Orion</em>, super dreadnought battleship of the Royal Navy. Heavier than the HMS <em>Dreadnought</em> but just as fast, this ship mounted 10 13.5-inch guns of greater armour-piercing power in five turrets along the centreline of the vessel. The <em>Orion</em> was present at the Battle of Jutland in 1916 and was scrapped under the Five-Power Naval Limitation Treaty of 1922.</span></span></div><cite class="credit d-block mt-5">The National Maritime Museum, London</cite></figcaption></figure><!--[BP]--><p class="topic-paragraph">The age of the <a href="https://www.britannica.com/technology/battleship-naval-ship" class="md-crosslink " data-show-preview="true">battleship</a> reached its apotheosis in World War I, as even the <em><a href="https://www.britannica.com/topic/Dreadnought-British-battleship" class="md-crosslink " data-show-preview="true">Dreadnought</a></em>, the archetypal “big-gun” ship, found itself outgunned. Super dreadnoughts, such as the HMS <em>Orion</em>, ruled the waves; their reign was short, however, as developments in naval aviation would soon render such ships obsolete.</p><!--[P]--><!--[MOD]--><span class="MOD"></span></div><!--[LIST-ITEM-8]--><span class="LIST-ITEM-8"></span></li><li><h2>Machine gun</h2><div><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media" data-type="image"><a href="https://cdn.britannica.com/90/177090-050-133E7B13/German-machine-gun-emplacement-World-War-I.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*199235"><img src="https://cdn.britannica.com/90/177090-050-133E7B13/German-machine-gun-emplacement-World-War-I.jpg?w=1000" alt="German machine gunners occupy a trench during World War I." data-width="1600" data-height="995" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif "><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/90/177090-050-133E7B13/German-machine-gun-emplacement-World-War-I.jpg" data-href="*199235">trench warfare</a><span>A German machine gun emplacement during World War I.</span></span></div><cite class="credit d-block mt-5">Prints and Photographs Division/Library of Congress, Washington, D.C. (digital file no. LC-USZ62-136100)</cite></figcaption></figure><!--[BP]--><p class="topic-paragraph"><a href="https://www.britannica.com/technology/machine-gun" class="md-crosslink " data-show-preview="true">Machine guns</a> were an exceptionally lethal addition to the battlefield in World War I. Heavy guns, such as the <a href="https://www.britannica.com/technology/Maxim-machine-gun" class="md-crosslink " data-show-preview="true">Maxim</a> and <a href="https://www.britannica.com/technology/Hotchkiss-machine-gun" class="md-crosslink " data-show-preview="true">Hotchkiss</a>, made “no man's land” a killing zone, and <a href="https://www.britannica.com/biography/Isaac-Newton-Lewis" class="md-crosslink " data-show-preview="true">Isaac Newton Lewis</a>'s light machine gun saw widespread use at the squad level and as an aircraft armament.</p><!--[P]--><!--[MOD]--><span class="MOD"></span></div><!--[LIST-ITEM-9]--><span class="LIST-ITEM-9"></span></li><li><h2>Tank</h2><div><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media" data-type="image"><a href="https://cdn.britannica.com/01/200901-050-BE42F690/Mark-IV-British-tank-trench-German-Battle-November-20-1917.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*236573"><img src="https://cdn.britannica.com/01/200901-050-BE42F690/Mark-IV-British-tank-trench-German-Battle-November-20-1917.jpg?w=1000" alt="Mark IV (Male) tank of H Battalion ditched in a German trench while supporting the 1st Battalion, 1st Leicestershire Regiment, one mile west of Ribecourt, northern France during the Battle of Cambrai, November 20, 1917.(World War I)" data-width="1600" data-height="1254" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif "><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/01/200901-050-BE42F690/Mark-IV-British-tank-trench-German-Battle-November-20-1917.jpg" data-href="*236573">tank in the Battle of Cambrai</a><span>British Mark IV (Male) tank ditched in a German trench during the Battle of Cambrai, November 20, 1917.</span></span></div><cite class="credit d-block mt-5">Robert Hunt Library/Mary Evans Picture Library/age fotostock</cite></figcaption></figure><!--[BP]--><p class="topic-paragraph"><a href="https://www.britannica.com/technology/tank-military-vehicle" class="md-crosslink " data-show-preview="true">Tanks</a> were used primarily in a supporting role. The armoured vehicle would not truly come into its own until the doctrines of J.F.C. Fuller and Basil Liddell Hart were more widely adopted in World War II.</p><!--[P]--><!--[MOD]--><span class="MOD"></span></div><!--[LIST-ITEM-10]--><span class="LIST-ITEM-10"></span></li><li><h2>Unexploded ordnance</h2><div><figure class="md-assembly md-feature-assembly print-false" data-type="1" data-descid="1"><div class="md-assembly-wrapper card-media" data-type="image"><a href="https://cdn.britannica.com/07/200607-050-A80B4173/shell-tree-France-Avricourt.jpg" target="_blank" class="gtm-assembly-link position-relative d-flex align-items-center justify-content-center " data-href="*236987"><img src="https://cdn.britannica.com/07/200607-050-A80B4173/shell-tree-France-Avricourt.jpg?w=1000" alt="A French blind projectile sticking fast at a tree new, Avricourt, France. (World War I)" data-width="1108" data-height="1600" loading="eager"><button class="magnifying-glass btn btn-circle position-absolute shadow btn-white top-10 right-10" aria-label="Zoom in"><em class="material-icons link-blue" data-icon="zoom_in"></em></button></a></div><figcaption class=""><div class="md-assembly-caption text-muted font-14 font-serif "><span><a class="gtm-assembly-link md-assembly-title font-weight-bold d-inline font-sans-serif mr-5 media-overlay-link" target="_blank" href="https://cdn.britannica.com/07/200607-050-A80B4173/shell-tree-France-Avricourt.jpg" data-href="*236987">World War I</a><span>Unexploded shell lodged in a tree near Avricourt, France.</span></span></div><cite class="credit d-block mt-5">Encyclopædia Britannica, Inc.</cite></figcaption></figure><!--[BP]--><p class="topic-paragraph">The French government estimates that millions of unexploded shells from World War I remain buried or undiscovered in the French countryside. Every year, bomb-clearing units remove more than 40 tons of unexploded munitions from the Verdun area alone. </p><!--[P]--><!--[MOD]--><span class="MOD"></span></div><!--[LIST-ITEM-11]--><span class="LIST-ITEM-11"></span></li></ul><span class="AM-END-OF-ARTICLE am-inline"></span></article> </div> </div> </div> <aside class="cm-rightrail d-none d-md-block ad-rail"></aside> </div> </div> </div> <div class="grid gx-0"> <div class="col"> <div class="md-loading hidden display-4 font-weight-normal"></div> <div class="text-center my-20 mb-100"> <button class="md-infinite-load-next btn btn-blue" data-value="next-page">Load More</button> </div> </div> <div class="col-md-da-320 hidden-xs"> </div> </div></div> </div> </main> <div id="md-footer"></div> <noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-5W6NC8" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript> <script type="text/javascript" id="_informizely_script_tag"> var IzWidget = IzWidget || {}; (function (d) { var scriptElement = d.createElement('script'); scriptElement.type = 'text/javascript'; scriptElement.async = true; scriptElement.src = "https://insitez.blob.core.windows.net/site/f780f33e-a610-4ac2-af81-3eb184037547.js"; var node = d.getElementById('_informizely_script_tag'); node.parentNode.insertBefore(scriptElement, node); } )(document); </script> <!-- Ortto ebmwprod capture code --> <script> window.ap3c = window.ap3c || {}; var ap3c = window.ap3c; ap3c.cmd = ap3c.cmd || []; ap3c.cmd.push(function() { ap3c.init('ZO4siT4cLwnykPnzZWJtd3Byb2Q', 'https://engage.email.britannica.com/'); ap3c.track({v: 0}); }); ap3c.activity = function(act) { ap3c.act = (ap3c.act || []); ap3c.act.push(act); }; var s, t; s = document.createElement('script'); s.type = 'text/javascript'; s.src = "https://engage.email.britannica.com/app.js"; t = document.getElementsByTagName('script')[0]; t.parentNode.insertBefore(s, t); </script> <script class="marketing-page-info" type="application/json"> {"pageType":"List","templateName":null,"pageNumber":1,"pagesTotal":11,"pageId":6621,"pageLength":null,"initialLoad":true,"lastPageOfScroll":false} </script> <script class="marketing-content-info" type="application/json"> [] </script> <script src="https://cdn.britannica.com/mendel-resources/3-130/js/libs/jquery-3.5.0.min.js?v=3.130.38"></script> <script type="text/javascript" data-type="Init Mendel Code Splitting"> (function() { $.ajax({ dataType: 'script', cache: true, url: 'https://cdn.britannica.com/mendel-resources/3-130/dist/list-page.js?v=3.130.38' }); })(); </script> <script class="analytics-metadata" type="application/json"> {"leg":"A","adLeg":"A","userType":"ANONYMOUS","pageType":"List","pageSubtype":null,"articleTemplateType":null,"gisted":false,"pageNumber":1,"hasSummarizeButton":false,"hasAskButton":false} </script> <script type="text/javascript"> EBStat={accountId:-1,hostnameOverride:'webstats.eb.com',domain:'www.britannica.com', json:''}; </script> <script type="text/javascript"> ( function() { $.ajax( { dataType: 'script', cache: true, url: '//www.britannica.com/webstats/mendelstats.js?v=1' } ) .done( function() { try {writeStat(null,EBStat);} catch(err){} } ); })(); </script> <div id="bc-fixed-dialogue"></div> </body> </html>

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