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Martial law is declared in russia
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First World war begins
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Mensheviks call for revolution in russia
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Revolution begins in St. Petersburg and the provisional government is established as the ruling power in the empire
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Tsar orders use of violence to reduce civil unrest
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Soldiers mutiny against the government and the Petrograd Soviet is formed
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Lenin publishes "April Thesis" and calls for further revolution
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Tsar Nicholas II resigns
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Bolsheviks storm Winter Palace and seize power from the Provisional Government
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Russia withdraws from first world war
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USSR is formed
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Lenin dies, stalin takes his place