Stalin
collapse of the Soviet Union
Gorbachev
The Chernobyl disaster Brought about perestroika
I think it was Gorbachev :P
communist countries led by the Soviet Union
communist countries led by the soviet union
Germany's unification led to the collapse of the Soviet union.
Supreme Soviet of the Soviet Union ended in 1991.
soviet economic collapse
The Soviet Union invading Afghanistan is what ended detente between the Soviet Union and the United States. The Soviet war in Afghanistan began in 1979.
The Bolsheviks led by Vladimir Lenin led the Russian Revolution in 1917 which in 1922 the name officially became the USSR Union of Soviet Socialist Republics or Soviet Union.
Hero of the Soviet Union ended in 1991.