Kampong Cham Province
Heng Samrin was born in Kampong Cham Province, Cambodia, in 1934. He joined the Khmer Rouge communist movement led by Pol Pot, and became a political commissar and army division commander when the Khmer Rouge, backed by China, took over the government in 1975. In 1978, after a series of violent purges within the Khmer Rouge leadership in which many prominent cadre members whom Pol Pot felt might be rivals were executed, he fled to Vietnam.