Heng Samrin
In Cambodia, The Vietnamese invasion had stopped the genocide of millions of Cambodians by the Khmer Rouge. The pro-Vietnamese People's Republic of Kampuchea was created with Heng Samrin as chairman in January 1979. Pol Pot's Khmer Rouge allied with non-Communist guerrilla forces led by Norodom Sihanouk and Son Sann to fight against the Vietnamese forces and the new Phnom Penh regime. Some high-ranking officials of the Heng Samrin regime in the early 1980s resisted Vietnamese control, resulting in a purge that removed Pen Sovan, prime minister and general secretary of the Kampuchean People's Revolutionary Party. The war lasted until 1989 when Vietnam withdrew its troops and handed the administration of Cambodia to the United Nations.