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Archduke Ferdinand of Austria-Hungary and his wife are assassinated
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Austria-Hungary declares war on Serbia
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Russia mobilizes
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Germany declares war on Russia
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Germany declares war on France
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Britain declares war on Germany
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Austria-Hungary declares war on Russia
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France and Britain declare war on Austria-Hungary
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The US joins the war
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The Armistice of 11 November 1918 takes place
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The war formally ends with the Treaty of Versailles