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Archduke Francis Ferdinand was assassinated by Gavrilo Princip.
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Kaiser William II promised German support for Austria against Serbia
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Austria demands serbia to end all anti austrian activities.
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Russian army defeated at Tannenburg and Masurian Lakes.
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austria declares war on serbia
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Germany declared war on France and invaded Belgium. Germany had to implement the Schlieffen Plan.
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Germany declared war on France
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war is started between these two countries
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Battle of the Marne started
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first battle of ypres