The February Revolution in Petrograd in 1917 was marked by severe food shortages and cold weather, leading to widespread strikes and demonstrations, primarily initiated by women workers. The situation escalated as soldiers sided with the demonstrators, culminating in Tsar Nicholas II's abdication and the formation of a provisional government alongside the Petrograd Soviet. As tensions grew, Lenin returned to Russia and organized the October Revolution, resulting in the Bolsheviks seizing power and establishing control over key areas by December 1917.