Whakakī i te rerenga e whai ake nei: I tuhituhi a Blair i muri mai kua whakaae a Serong ki te tiaki i a Vietnam ki te Tonga mai i te communism hei "miihana whaiaro", ana ko tana whakatau ki te reti wawe i ahu mai i tana kaha haere ki nga whakahaere o Amerika, te uara i hoatu e ratou ki tana mahi me tana tohu hei tangata o te ao, me te tipu haere o te "tawhiti wairua" mai i te Ope Taua o Ahitereiria me tona kaiarahi matua. I tuhituhi a ia i muri ake nei "... i kitea e ia he huarahi hei mahi nui atu ki te whenua i waho atu i a ia". I noho a Serong ki Vietnam ki te Tonga hei kaitohutohu mo te haumarutanga me te maatauranga ki te kawanatanga o Vietnam. I whakaakona hoki ia i te National Defense College o Vietnam ki te Tonga me te mahi mo te whakahaere Rand, Hudson Institute me etahi atu umanga, e whakarite ana i nga wetewete rautaki. He kaitohutohu hoki ia mo te Pentagon me nga roopu whakamahere kaupapa here o etahi perehitini o Amerika, tae atu ki te tari a Nixon. I te tau 1971, i kii a Serong kua wikitoria a Vietnam ki te Tonga i te pakanga. I noho tonu ia i muri i te wehenga atu o nga ope o Ahitereiria, i haere tonu ia ki te mahi ki Vietnam ki te Tonga tae noa ki te
Te hinganga o Saigon. I wehe atu a Serong i Saigon i te ra i mua o tana hopu, ka wehe atu ma te rerenga rerenga whakamutunga mai i te US Embassy i te 29 o Aperira 1975. I whakawhiwhia ia ki nga tohu US me te Tonga o Vietnam, tae atu ki te United States Legion of Merit, te (Vietnam) Medal of Honour, Cross of Gallantry (me te nikau), me te Knight of the National Order of Vietnam.