With a Khmer Rouge victory imminent, the United States government evacuated US nationals and allied Cambodians on 12 April. On 17 April, the Khmer Republic government evacuated the city, intending to establish a new government center close to the Thai border to continue resistance. Later that day, the last defences around Phnom Penh were overrun and the Khmer Rouge occupied Phnom Penh.

Captured Khmer Republic forces were taken to the