feb 15, 1917 - Communism revolution .

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The Russian Revolution was a series of uprisings that took place in 1917 to overthrow Tsar Nicholas II and, later, the provisional government. The insurrections resulted in the abdication of the Tsar, the fall of the provisional government and the seizure of power by the Bolsheviks, led by Lenin. This led them to definitely leave the SESB war.

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