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Franz Ferdinand Assassinated
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Austria Declares War on Serbia
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Germany Declares War Against Russia
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Germany invades Belgium
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Britain Declares War on Germany
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The Lusitania was sunk by German U-Boat
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Italy Declares War on Germany
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Germany started unrestricted submarine warfare
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United States Declares War on Germany
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Britain launches massive attack on Western Front
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Advance of Allies was successful
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Germany signs armistice with Allies ending War
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Treaty of Versailles
