Cambodian Genocide Timeline By causeofschool Apr 17, 1975 The Khmer Rouge Take control over Cambodia The Khmer Rouge was led by a man named Pol Pot May 7, 1977 Most of the Genocide The Khmer Rouge sent the people of Cambodia to agricultural reeducation camps. Jan 11, 1979 The Genocide is over! In January the Vietnamese invaded cambodia, defeated the Khmer Rouge, and ended the genocide.