The Russian Revolution of 1917 was a pivotal series of events that led to the overthrow of the Romanov dynasty and the establishment of the first socialist state. It unfolded in two main phases: the February Revolution, which resulted in the abdication of Tsar Nicholas II and the formation of a provisional government, and the October Revolution, where the Bolsheviks, led by Vladimir Lenin, seized power. This revolution sparked a civil war between the Bolshevik Red Army and the anti-Bolshevik White Army, ultimately leading to the creation of the Soviet Union in 1922. The revolution brought about significant social, economic, and political changes, including land redistribution and nationalization of industry.