Originally a Cambodian high school, Tuol Sleng was converted into a prison by the communist Khmer Rouge government. In 1979, the site was captured by the People’s Army of Vietnam; in 1980, the Vietnam and USSR-supported People's Republic of Kampuchea—an alternative Cambodian communist government and enemy of the Khmer Rouge—founded the Tuol Sleng Genocide Museum in the former prison. The museum stands as a memorial to the approximately 17,000 to 20,000 victims executed there.