From Prague Spring to Soviet winter: 50 years since the Warsaw Pact invasion
The Prague Spring was a period of political liberalization in Czechoslovakia during the era of its domination by the Soviet Union after World War II. It began on 5 January 1968, when reformist Alexander Dubček was elected First Secretary of the Communist Party of Czechoslovakia (KSČ), and continued until 21 August 1968 when the Soviet Union and other members of the Warsaw Pact invaded the country to halt the reforms.