The document summarizes the end of the USSR, beginning with key events and figures in the early Soviet period through World War II under Stalin. It then discusses reforms under Gorbachev in the 1980s that contributed to the collapse of the Soviet Union, including perestroika and glasnost. Major events of the dissolution included the fall of the Berlin Wall in 1989, independence of Baltic states in 1989-1991, a failed coup against Gorbachev in 1991, and the formal dissolution of the USSR on December 25, 1991, resulting in 15 new independent countries emerging from the former Soviet republics.