[4][5] In 1967, the Tiv Ol-led group of leftist teachers began to shift to the countryside, to escape state repression.
Tiv Ol himself left the capital in November 1967, and made his way to the clandestine CPK Party Centre.
After communist forces took control over the area, Tiv Ol organized the re-opening of the local school and hospital as well as initiating some agrarian reforms.
[6] Tiv Ol, like others in the CPK Eastern Zone, represented a sector within the party which held ambivalent views on the relation between Vietnamese and Cambodian communists.
[7] In 1977 Tiv Ol fell victim of a purge of the core of the Khmer-Chinese Friendship Association.