Cambodian–Vietnamese War
Additionally, the Khmer Rouge conducted many cross-border raids into Vietnam where they slaughtered an estimated 30,000 Vietnamese civilians. Most notably, during the Ba Chúc massacre in April 1978, the Khmer Rouge military crossed the border and entered the village, slaughtering 3,157 Vietnamese civilians at once. This forced an urgent response from the Vietnamese government, precipitating the Cambodian–Vietnamese War in which the Khmer Rouge was ultimately defeated.