Mezue ahịrịokwu na-esonụ: Na November 1978, ndị agha Vietnam
wakporo Cambodia n'ihi mwakpo ndị Khmer Rouge wakporo ókèala. Ndị mmadụ Republic of Kampuchea (PRK), a pro-Soviet ala edu Kampuchean People's Revolutionary Party, a party kere site na Vietnamese na 1951, na-edu site a ìgwè nke Khmer Rouge onye gbapụrụ Cambodia zere purged site Pol Pot na Ta Mok, e guzobere. Ọ nọ n'okpuru ndị agha Vietnam na-arụ ọrụ na n'okpuru nduzi nke onye nnọchi anya Vietnam na Phnom Penh. Ngwá agha ya sitere na Vietnam na Soviet Union.