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Chernenko dies
Chernenko dies and is replaced by Mikhail Gorbachev as general secretary of the Communist Party -
Glasnost
Gorbachev promulgates the policies of openness, or glasnost, and restructuring, or perestroika -
Chernobyl
Chernobyl nuclear power station explodes, showering large areas in Ukraine, Belarus and beyond with radioactive material. -
Political reform
Gorbachev proposes economic and political reform -
Superpower Treaty
Gorbachev signs superpower treaty with US to begin scrapping nuclear warheads -
Lithuanian Independent
Soviet troops leave Afghanistan; nationalist riots put down in Georgia; Lithuanian Communist Party declares its independence from the Soviet Communist Party -
USSR disolved
Congress of People’s Deputies votes for the dissolution of the Soviet Union