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Austria-Hungary declares war on Serbia
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Period: to
WWI
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Archduke Franz Ferdinand is assassinated.
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Germany declares war on France as part of the Schlieffen Plan.
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the British begin a naval blockade of Germany.
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Lusitania sinks
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Bulgaria enters the war by declaring war on Serbia.
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The Battle of the Somme begins.
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U.S officially declared war on Germany
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The Russians peace with the central powers and leave the war
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President Woodrow Wilson issues his "Fourteen Points" for peace and an end to the war.
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Fighting of WWI comes to an end
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Treaty of Versailles is signed