Keo Meas, then a fourth-year student at the Phnom Penh Teachers Training College, was recruited to the Indochinese Communist Party by Son Sichan in 1946.
[7] After the cessation of hostilities in the same year, Keo Meas was one of the representatives of the UIF in the Viet Minh side of the Joint Commission for the Implementation of the Geneva Accords.
[10] As the KPRP went through a period of crisis, Tou Samouth formed a reorganized 4-member party leadership (labelled the 'urban committee').
However, due to the harsh political climate, Keo Meas was the only Krom Pracheachon candidate able to run any campaign work at all.
[15] Keo Meas travelled to Hanoi in the second half of 1968, to seek support from the exiled communist leadership for the ongoing struggle of the party in Cambodia.
[18] Keo Meas became the ambassador of the Royal Governmental of National Unity of Kampuchea to the People's Republic of China.
[19] Keo Meas returned to Cambodia in May 1975 to begin working at the office of the party Central Committee.