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Assassination of Archduke Franz Ferdinand aong with his wife in Sarajevo
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Germany and the Ottoman Empire sign a secret alliance treaty
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Austria-Hungary seeks German support for a war against Serbia in case of Russian mobilization. Germany gives assurances of support
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Austria-Hungary sends an ultimatum to Serbia, and their respnse is seen as unsatisfactory
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Austria-Hungary declared war on Serbia
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Germany warns Russia to stop mobilizing
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Germany declared war on Russia
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Italy declares its neutrality
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Germany declared war on France and Belgium
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Britain declared war against Germany
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Germany's invasion of Belgium