It combined the populations of Nong Samet (Rithysen), Bang Poo (Bang Phu), Nong Chan, Nam Yeun (a camp located on the eastern Thai-Cambodian border, near Laos[4]), Sanro (Sanro Changan), O'Bok, Ban Sangae (Ampil), and Dang Rek (Dong Ruk)[1] camps,[3]: 88  all of which had been displaced by fighting between November 1984 and March 1985.

These camps supported the non-communist resistance spearheaded by Son Sann's Khmer People's National Liberation Front (KPNLF).

[5] However, Site Two was intended as a civilian camp and the Khmer People's National Liberation Armed Forces (KPNLAF) were based in other locations.

This was in keeping with the Thai policy of "humane deterrence": the principle that the camps should not become permanent settlements or provide a level of assistance beyond what the refugees could expect to find in Cambodia.

[3]: 75 Education at Site Two progressed slowly due to the Thai Government's policy of "humane deterrence" which discouraged programs and services that would attract refugees from Kampuchea.

In 1988, with the agreement of the Royal Thai Government, UNBRO launched a major new educational assistance program, focusing at the primary level and providing support for curriculum development, the printing of educational materials, teacher training and the training of teacher trainers, the provision of supplies and the construction and equipment of classrooms.