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Assassination of Archduke Franz Ferdinand of Austria
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Austria-Hungary seeks German support for a war against Serbia in case of Russian militarism.
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Austria-Hungary declares war on Serbia. Russia mobilizes
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Germany declares war on Russia
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Austria-Hungary declares war on Russia.Serbia declares war on Germany.
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Japan declares war on Germany.
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Russia declares war on the Ottoman Empire.
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Italy declares war on Germany.
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The United States of America declares war on Germany
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Treaty of Versailles between the Allies and Germany