Lon Nol
After overthrowing pro-China Sihanouk, Cambodian leader Lon Nol, despite being anti-Communist and ostensibly in the "pro-American" camp, backed FULRO against all Vietnamese, both anti-communist South Vietnam and the Communist Viet Cong. Lon Nol planned a slaughter of all Vietnamese in Cambodia and a restoration of South Vietnam to a revived Champa state. The Khmer Rouge later imitated Lon Nol's actions.