The Communist victory in Vietnam further emboldened the Communist movement within Thailand. After the Thammasat University massacre in 1976 and the repressive policies of Tanin Kraivixien sympathies for the movement increased, and by the late 1970s it was estimated that the movement had about 12,000 armed insurgents, mostly based in the northeast along the Laotian-Khmer border. Counter-insurgency campaigns by the Thai military meant that by the 1980s insurgent activities had been largely defeated. Meanwhile, the Vietnamese invasion of Cambodia in 1978 to remove the Pol Pot regime – tacitly supported by Thailand and China – brought the Vietnamese-Thailand conflict up to the Thai border, resulting in small border raids and incursions by Vietnamese against the remaining Khmer Rouge camps inside Thai territory, that lasted until 1988. Thailand, meanwhile, with US support sponsored the creation of the Khmer People's National Liberation Front, which operated against the new Vietnamese-backed Cambodian government from 1979 onwards from bases inside Thailand. Similar small skirmishes emerged along the Thai-Laotian border in 1987–1988.