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After the Austro-Hungary monarchy declared war on Serbia, France and Russia who were protecting Serbia declared war on Austria-Hungary. and then Germany declared war on Russia and France, then UK declared war on Germany...

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14y ago
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Tetrial

Lvl 5
4y ago

Austria-Hungary's future king was assassinated

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Wiki User

13y ago

because they are siberea's friends

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Q: What happend after Austria Hungary declared war on Serbia?
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