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Archduke Franz Ferdinand is assassinated in Sarajevo. His death is the event that sparks World War I.
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Russia mobilizes its vast army to intervene against Austria-Hungary in favor of its ally, Serbia.
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Germany invades Belgium
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The Battle of Liège was the first battle of the war, and could be considered a moral victory for the allies
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attempt by the French Army to outflank the German Army
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The Germans fire shells filled with chlorine gas at Allied lines.
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A German submarine sinks the passenger liner Lusitania. The ship carries 1,198 people, 128 of them Americans.
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A German submarine sinks the passenger liner Lusitania. The ship carries 1,198 people, 128 of them Americans.
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British intelligence gives Wilson the so-called Zimmermann Telegram, a message from German foreign secretary Arthur Zimmermann proposing that Mexico side with Germany in case of war between Germany and the United States. In return, Germany promises to return to Mexico the "lost provinces" of Texas and much of the rest of the American Southwest
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There were in fact three battles fought around the Ypres salient during the War.
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British intelligence gives Wilson the so-called Zimmermann Telegram, a message from German foreign secretary Arthur Zimmermann proposing that Mexico side with Germany in case of war between Germany and the United States. In return, Germany promises to return to Mexico the "lost provinces" of Texas and much of the rest of the American Southwest
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Congress authorizes a declaration of war against Germany
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Congress passes the Selective Service Act authorizing the draft.
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the British launched the first full-scale offensive that was designed exclusively to accommodate the British secret weapon, the tank
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The Germans sign a peace treaty with the new Bolshevik government
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The Battle of Cantigny is the first major American offensive of the war.
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US marine corps attack the Germans
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The Battle of St. Mihiel begins when 300,000 American troops under the direct command of General Pershing fling themselves into the German lines.
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Kaiser Wilhelm abdicates, ending all German hope for a victory.
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An Armistice is signed ending fighting on the Western Front.