From 1970 - 1979 the Khmer Rouge took control of Mondulkiri province in Cambodias northeast. Between these years it was known as Khmer Rouge Region 105. They controlled this region five-years before the fall of Phnom Penh, and most of Cambodia.
In the Northeast Zone (Mondulkiri, Ratanakiri, Stung Treng, and Kratie), its remote forests provided fertile grounds for the Khmer Rouge to gain support, and provided an early base area for the Khmer Rouge.
The indigenous highlanders were detached from the the central government in Phnom Penh. In the 1960s, this allowed for the Khmer Rouge to gain support and recruit indigenous minorities in the region.
After the effects of the french on the groups, and their gratitude towards the king, this past was used to recruit willing indigenous people whom wanted to join the Khmer Rouge to help their king, who helped them previously.
Later the Khmer Rouge forced communities to relocate from their traditional lands, forced into labour, banned religious practices, and purged people they were suspicious of for supporting Prince Sihanouk, or the Vietnamese. As the Khmer Rouges paranoia grew, the greater the purges of the indigenous people in Region 105.
Due tot he Khmer Rouge, many indigenous people fled the country to Vietnam, whilst many were relocated by the Khmer Rouge, finding themselves internally displaced. Those who remained, like everybody else, had no cultural identity, unable to practice their beliefs under the oppression of the Khmer Rouge rule. The war ravished their ancestral lands with landmines and American bombs, and their forests became Khmer Rouge strongholds.
During this period, many indigenous people, as well as indigenous Khmer Rouge cadres were arrested, tortured, and executed.
Here i searched for the remaining traces of what remained of the Khmer Rouge Headquarters in Region 105.