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On June 28, 1914, Archduke Franz Ferdinand was assassinated in Austria. He was supposed to become the future heir to the Autstrian-Hungary throne.
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Russia gathers it's army against Austria-Hungary to help Serbia.
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Germany invades Belgium officially beginning the war.
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The German Submarine sinks the passenger liner. The Ship carries 1,198 people and 128 of them were Americans.
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The U.S. learned of the German telegram offering Mexico and the U.S. territory if they joined Germany.
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On April 2, 1917, President Woodrow Wilson outlines his case for war to congress.
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The congress gathers up a declaration of war against Germany. The United States enters World War 1 on the side of France and Britain.
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The congress passes the Selective Service Act and forced the men to joined the army.
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On March 3, 1918, The Bolshevik leader Lenin signed a peace treaty with Germany.
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On November 11, 1918, World War 1 ended at 11:00 A.M. Germany signed an armistice to an agreement for peace that had been prepared by Britain and France.