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Germany, Austria-Hungary, and Italy came together to form the triple alliance.
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A millitary draft was put in place in many European contries, making their army grow tremendously.
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France and Russia form a military alliance
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France, Great Britain, and Russia came together to form the Triple Entente
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Wanting to expand their empire to the Balkans Austria-Hungary annexed Bosnia. Serbia became annoyed with this and sought to protect Bosnia with their allie Russia was on their side. They then backed down after relizing Germany was on Austria-Hungarys side.
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Francis Ferndinand, Archduke of the Austro-Hungarian empire was assasinated in the Bosnian city of Sarajevo.
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Austria-Hungary declares war on Serbia
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In support of Serbia Czar Nicholas II of Russian orders a partial mobiliation of the Russian army.
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Russia ordered full mobilization knowing that Germany would coinsider the partial mobilization an acct of war.
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Germany told Russia to halt their mobilzation within 12 hours or else. Russia didnt stop. Germany declared war against them.
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Germany declared war on France
