Kana mutungamiri Nixon yakatanga kupinda muna 1970, American uye South Vietnamese mauto kushanda pasi pemuraira mhepo chifukidziro kuti akanga akasarudzwa Operation Freedom Deal. Apo mauto iwayo vakabviswa, mhepo oparesheni akaramba, ostensibly kuti kurambidza PAVN / Viet Cong mauto kufamba uye logistics. Muzvokwadi (uye asingazivikanwi US Congress uye American voruzhinji), vakanga kushandiswa kupa tactical rutsigiro FANK. Sezvo aimbova mukuru wemauto US muna Phnom Penh yakashuma, "nzvimbo dzakapoteredza rwizi Mekong vakanga saka azere craters kubva B-52 anorova, pasinei 1973, vakatarira akafanana mwedzi mumipata".
mutungamiriri wehurumende uye gurukota rezvekudzivirira