The 1968 programme of liberalization, begun under a new Communist Party leader in Czechoslovakia. In August 1968 Soviet tanks invaded Czechoslovakia and entered the capital Prague to put down the liberalization movement initiated by the prime minister Alexander Dubcek, who had earlier sought to assure the Soviets that his planned reforms would not threaten socialism. Dubcek was arrested but released soon afterwards. Most of the Prague Spring reforms were reversed. See also
Czechoslovakia,
Prague Spring.
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