In January 1968, Alexander Dubcek became leader of Czechoslovakia and instituted democratic reforms, which were initially popular. However, in August 1968, Soviet forces invaded Czechoslovakia to end the reforms, arresting Dubcek and forcing him to renounce his policies. Though the Soviets claimed they were responding to fascist threats, they faced widespread non-violent protests from Czech civilians. After a week of occupation, Dubcek was released but forced to invalidate the reforms and reimpose censorship and control over unions and media. The Soviet occupation lasted until 1991 and spurred further anti-communist resistance in Czechoslovakia.