From 1968 to 1972, the mountains of Phu Hin Rong Kla were the major strongholds for the communists, who were threatening the political stability of the nation. In 1982, government forces began the battle in Phu Khang, and attempt to drive out the insurgents. Forces from the First, Second and Third Army of the Regional Army Commend joined together with the Aviation Divison, Special Force center, the Royal Navy, the Royal Air Force, and Civilian Thai Forces in trying vanquish the communists. The government forces were unsuccessful, primarily because of the unforgiving terrain, set high up in the mountains in mostly dense forest.