Ka kammala wannan magana: A shekara ta 1977, 'yan Khmer Rouge sun soma kashe mutanen da ake zargi da rashin aminci. Hun Sen, wanda ya haura zuwa mukamin Kwamandan Battalion, ya zama paranoid kuma ya tsere tare da mabiyansa zuwa Vietnam inda suka shiga rundunar 'yan tawaye da kuma gwamnatin maye gurbin da' yan Vietnam suka shirya a gabanin ta
kokarin da ake yi na kifar da gwamnatin Khmer Rouge. Bun Rany, wanda aka bari a baya, Khmer Rouge ya ɗaure shi kuma ba zai sake ganin mijinta ba har kusan shekaru biyu bayan da Vietnamese suka mamaye Cambodia a shekarar 1979. Bayan kayar da Khmer Rouge da mamaye Kambodiya, 'yan Vietnam sun nada Hun Sen a matsayin Mataimakin Firayim Minista kuma sun' yantar da Bun Rany wanda daga nan ya fara shirya gidajen marayu da makarantu ga marayu da aka bari a baya ta hanyar manufofin kisan kare dangi na Khmer Rouge. A cikin 1985, an nada Hun Sen Firayim Minista, yana ba Bun Rany kyakkyawan dandamali don faɗaɗa ayyukanta na tattalin arziki da aikinta na jin kai. A lokacin aiwatar da sake kusantar da Thai-Cambodian bayan 1988, ta kulla dangantaka ta kusa da matar Firayim Ministan Thailand Chatichai Choonhavan, kuma ta shiga cikin kasuwancin da ke ci gaba da sauri tsakanin Cambodia da Thailand. Daga matsayinta na uwargidan shugaban kasa, ta fara jawo hankali ga wahalar wadanda ke dauke da cutar kanjamau / AIDS, talakawa da matsalolin mata. A watan Afrilun 1994 a taron farko na Red Cross na Kambodiya, an zabe ta a matsayin Mataimakin Shugabanta yayin da aka zabi Gimbiya Eng Marie, matar tsohon Firayim Minista Prince Norodom Ranariddh a matsayin shugabanta. A majalisa ta biyu a shekarar 1998, an zabi Bun Rany a matsayin Shugaban kasa bayan Hun Sen ya karfafa ikonsa ta hanyar hambarar da Ranariddh da karfi.