| − | The October Revolution took place in Russia led by Bolshevik leader, Nikolai Lenin. He returned from exile when the tsarist (czarist) rule ended and led the Bolsheviks into power. Lenin then ruled the Soviet Union and imposed a system of Marxism-Leninism. | + | The October Revolution took place in Russia led by Bolshevik leader, Nikolai Lenin. He returned from exile when the tsarist (czarist) rule ended and led the Bolsheviks into power. Lenin then ruled the Soviet Union and imposed a system of Marxist-Leninist. |