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Assassination of Francis Ferdinand
The assassination of Archduke Francis Ferdinand, heir to the throne of the Austro-Hungarian empire, by a Serbian nationalist -
Austrians issue an ultimatum to the government of Serbia
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Austria-Hungary declare war on Serbia
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Russian government mobilitized troops to defend Serbia and itself. Tsar ordered mobilization against Germany.
Russian government mobilitized troops to defend Serbia and itself. Tsar ordered mobilization against Germany. -
Tsar ordered mobilization against Germany.
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German ultimatum to Russia demanding to cease mobilization.
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Ultimatum addressed to France demanding to know it's intentions
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German government declared war on Russia
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France starts to mobilize
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Germans declare war on France