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Otto Von Bismark use war to unify Germany
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Loss of Alsacelorraine to Germany in the Franco-Prussian war.
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Creation of several militaries alliances betweem great powers.
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Duall alliance between Germany and Austria-Hungary.
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Bismark makes a treaty with Russia.
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Italy joined the two countries forming the Triple Alliance.
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Treaty between Germany and Russia lanse.
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Defensive military alliance between Russia and France was formed.
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Tro rival camps existed in Europe. The Triple Alliance (Germany, Austria-Hungary and Italy), and the Triple Entente Alliance (Great Britain, France, and Russia).
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The Archduke Frant Ferdinand and his wife were shot.
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Austria presented Serbia with an ultimatum containing numerous demands.
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Austria rejected Serbia's offer and declared war.