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Austria Hungary declares war on Serbia
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Germany declares war on Russia
Germany declares war on Russia -
Germany declares war on France
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U.S. President Woodrow Wilson announces the U.S. will remain neutral.
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The Battle of Tannenberg begins
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Battle of Ypres begins.
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The United Kingdom announces that the North Sea is a military area, effectively creating a blockade of goods into Germany.
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Germany declares a "war zone" around Great Britain
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The Second Battle of Ypres begins
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The Battle of Gallipoli begins.
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Russian Tsar Nicholas II abdicates.
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The United States declares war on Germany.
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The Battle of Passchendaele (also known as the Third Battle of Ypres) begins.
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The Bolsheviks successfully overthrow the Russian government
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U.S. President Woodrow Wilson issues his Fourteen Points to peace.
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Germany launches the Spring Offensive.
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The Second Battle of the Marne begins.
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German Kaiser Wilhelm II abdicates and flees Germany.
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Germany signs the armistice at Compiegne, France.
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The Treaty of Versailles officially ends WWI.