Son Sann
In 1978, he formed the Khmer People's National Liberation Front (KPNLF) to unite anti-communist refugees on the Thai-Cambodia border following the 1978 Vietnamese invasion of Cambodia. The KPNLF later joined with the Armeè Nationale Sihanouk to form the non-communist resistance and in 1982, the KPNLF joined with Sihanouk and the Party of Democratic Kampuchea to form the Coalition Government of Democratic Kampuchea. Son Sann was named Prime Minister in the new coalition government.