昆沙
In October 1981 a 39-man unit of Thahan Phran and Burmese guerrillas attempted to assassinate the drug warlord Khun Sa at the instigation of the US Drug Enforcement Administration. The attempt failed, however in January 1982 a Thahan Phran squad from Pak Thong Chai, together with units from the BPP and the Royal Thai Army, was used to force Khun Sa to move his headquarters from Ban Hin Taek in northwest Thailand across the border into Myanmar.