Czechoslovak Socialist Republic

State in Europe from 1948 to 1989 The Czechoslovak Socialist Republic (known from 1948 to 1960 as the Czechoslovak Republic), Fourth Czechoslovak Republic, or simply Czechoslovakia, was the Czechoslovak state from 1948 until 1989, when the country was under communist rule, and was regarded as a satellite state in the Soviet sphere of interest. Following the coup d'état of February 1948, when the Communist Party of Czechoslovakia seized power with the support of the Soviet Union, the country was declared a "people's democratic state" when the Ninth-of-May Constitution became effective. The traditional name Československá republika (Czechoslovak Republic), along with several other state symbols, were changed on 11 July 1960 following the implementation of the 1960 Constitution of Czechoslovakia as a symbol of the "final victory of socialism" in the country. In April 1990, shortly after the Velvet Revolution, the Czechoslovak Socialist Republic was renamed to the Czech and Slovak Federative Republic. On 10 December 1989, the National Government of Understanding was established with Marián Čalfa as Prime Minister, replacing a Ladislav Adamec led communist government, with a cabine