In the aftermath of World War II, a victorious Soviet Union succeeded in forcing its political, social, and economic system on Eastern Europe, including Hungary. But the Hungarians never reconciled themselves to Soviet hegemony over their country and rebelled against the Soviet Union and its Hungarian vassals in 1956. That revolution was crushed by Soviet tanks, but it brought to power Janos Kadar, who then attempted to institute a milder form of communist rule.
Data as of September 1989