He was a member of the supreme committee of the Republic of Cambodia, along with General Sak Sutsakhan, Long Boret, Hang Thun Hak, Op Kim Ang, General Ear Chhong (Chief of Staff of the Air Force), and Admiral Vong Sarendy (Chief of the Navy Staff). The committee tried to "organize a surrender" as the Khmer Rouge took over the country.
As a key figure in the Cambodian government, he was part of an elite committee that attempted to negotiate a peaceful resolution as the Khmer Rouge seized control of the nation.