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Germany, Austria-Hungary, and Italy formed an alliance.
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An invrease in growth of mass armies porduced even more tension.
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France, Great Britain, and Russia form an alliance.
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Europeans states were angry at one another and seeked revenge.
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Archduke Francis Ferdniand and his wife were killed in Sarajevo by a 19 yearold.
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Austria-Hungary declares war on Serbia.
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Germany declares war on Russia after Russia ignored orders to halt its mobilization.
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Great Britain declares war on Germany for violating Belgian neutrality.
