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Period: to
WW1
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Threat of possible war
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The war machinery was prepared
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Vienna gave an ultimatum to Belgrade
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Russia allied with Serbia and sent a troop to the border
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Austrian guns fire Belgrade
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Alemania declares war to Russia
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General order of mobilization in France
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The Treaty of Versailles
As the most important treaty of World War I, it ended the state of war between Germany and most of the Allied Powers.