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Archduke Ferdinand is assassinated
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Austria-Hungary declares war on Serbia
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Ottoman Empire declares war on Allies.
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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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Attack on Lusitania.
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British intercept the Zimmerman Telegram
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United States enters the war.
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Russians leave the war.
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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 I