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In Sarajevo, the Archduke and his wife are killed by Gavrilo Princip. Serbia is suspected as responsible for the attack.
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The majority of the Senate votes for war and then President Wilson signs the declaration. Over the next few years millions of men joined the armed forces.
[https://youtu.be/8vWxWxAo7uE] -
Germany signs an armistice with the Allied Powers. This will prevent Germany to start military action again.
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The Treaty of Versailles imposed limits on territorial, military, and economic provisions on Germany.