Responding to repeated armed incursions by Cambodian forces into its border villages, Soviet-allied Vietnam forms the Kampuchean National United Front for National Salvation (KNUFNS) made up of communist and noncommunist Cambodian exiles. The KNUFNS invades Cambodia in 1979 and seizes the capital city of Phnom Penh, forcing the Khmer Rouge to flee to the jungles along the Thai border. Heng Samrin becomes Cambodia’s new president.
