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Archduke Ferdinand was assassinated
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Austria-Hungary declares war on Serbia
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Germany declares war on France and Russia
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Allies defeat the Germans at the first battle
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Ottoman Empire declares war on the allies
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The Lusitania was attacked and sank
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British intercept Zimmerman telegram
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The U.S. enters the war
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Russia leaves world war 1
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President Wilson issues his "Fourteen Points"
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Germany agrees to an armistice and fighting ends
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treaty of Versailles is signed ending world war 1