The document summarizes the Russian Civil War and its aftermath. It describes how Lenin's Red Army defeated the opposing White forces by 1920-1921, establishing communist rule. It then explains Lenin introduced the New Economic Policy in 1921 to rebuild the devastated economy through limited private enterprise. However, upon Lenin's death in 1924, a power struggle ensued between Trotsky and Stalin, which Stalin ultimately won, becoming dictator and embarking on a program of rapid industrialization through five-year plans but also purges to consolidate his control.