Pedzisa mutsara unotevera: Lon Nol paakava nesimba muna 1970, hurumende yeKhmer Republic yakatanga chirongwa chokuparadzira nhema chokuratidza vanhu vorudzi rweVietnamese sevamiririri veVietcong. Vanhu vokuVietnam vanenge 30 000 vakasungwa ndokuurawa vari mujeri, nepo vamwe vane makumi ezviuru vakatizira kuVietnam. Makore mashanu gare gare muna 1975, vanhu vokuVietnam vasingasviki 80 000 vakanga vasara muCambodia apo vaKhmer Rouge vakatora simba. Vanodokusvika zvikamu zvitatu kubva muzvitanhatu zvavo vakadzingwa vachiendeswa kuVietnam, uye vamwe 20 000 vakasara ndevaya vane dzinza rakasanganiswa reVietnamese neKhmer. Vaya vakasara vakaurayiwa nehurumende yacho. Nenguva,
Mauto eVietnam akapinda muCambodia muna 1979, zvinenge vagari vose veCambodia vechiVietnam vakamanikidzwa kusiya misha yavo kana kuti vakaurayiwa. Vietnam yakagadza hurumende itsva inozivikanwa sePeople's Republic of Kampuchea (PRK), uye vanachipangamazano veVietnam vakagadzwa muhurumende itsva yehurumende. Muna 1983, hurumende yePRK yakagadzira mutemo wepamutemo wekukurudzira vaimbova vagari veVietnamese veCambodia kuti vadzokere kunogara. Vapoteri vokuVietnam vakanga vasina ukama hwemhuri kuCambodia vakauyawo kuzogara munyika yacho, sezvo pakanga pane zvishoma zvekutonga kwemuganhu kurambidza vapoteri vokuVietnam kupinda munyika. MaVietnam akazivikanwa sevanhu vashoma pasi pehurumende yePRK, uye Overseas Vietnamese Associations yakavambwa mumativi eCambodia ane huwandu hukuru hwevanhu veVietnamese. Hurumende yePRK yakapawo makadhi ekuzivikanwa kwavari kusvika kubviswa kwemauto eVietnam muna 1990.