Whakaotihia te rerenga e whai ake nei: I mahi te hononga o nga roopu i te wa o Nguyễn Văn Thiệu hei Perehitini ka huri i tona ingoa ki te "Social Democratic Alliance" i te tau 1973. Heoi, i te kaupapa here Vietnamization i whakaaetia e te Perehitini o U.S. Richard Nixon, i timata a Vietnam ki te Tonga ki te hinga. Ko te Paris Peace Accords o te tau 1973 he tohu hurihanga i roto i te pakanga, na te mutunga o te whakauru a Amerika ki Vietnam. Ahakoa te whakaaetanga rangimarie i waenga i te Communist North Vietnam me te Capitalist South Vietnam, i te tau 1975 ka pakaru te rangimarie a Vietnam ki te Raki ka tiimata te tango i a Vietnam ki te Tonga. I te mea kaore i whakaae te United States ki tetahi atu whakauru, ka hinga a Vietnam ki te Tonga i muri i te
Te hinganga o Saigon, nā reira i whakakotahi anō ai a Vietnam i raro i te kāwanatanga o te kāwanatanga.