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Assassination of Achduke Ferdinand
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Austria-Hungary declares war on Serbia
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Austria-Hungary declares war on Russia and Serbia declares war on Germany.
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Germany declares war on Russia
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Germany declares war on France
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Germany declares war on France The United Kingdom declares war on Germany after Germany invades Belgium
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First Battle of the Marne begins
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Battle of Ypres
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Germany declares a "war zone" around Great Britain
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The British ocean liner RMS Lustinania by German U-boat
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Zimmerman Telegram
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Russia withdraws from war
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The U.S. Declares war on Germany
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Bolsheiviks overthrow government
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Woodrow Wilson’s Fourteen Points
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Germany signs armistice
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Treaty of Versailles