"Red Cambodians"; a Maoist group that engaged in civil war against their government, parallel to Vietnam's Viet Cong (whom they assisted, leading to US bombing) and Laos' Pathet Lao. All three won in 1975; the KR began a mass societal reorganization (The Killing Fields) that chills, even decades later. The sight of those piled-up skulls and bones. They lost power after the 1978 invasion by Vietnam, and fought guerrilla actions until the 1998 death of their leader Pol Pot