Genocide in Cambodia

The Cambodian genocide refers to the systematic persecution, forced labor, starvation, and execution carried out by the Communist Party of Kampuchea (the Khmer Rouge) during its rule of Democratic Kampuchea from April 1975 to January 1979. After seizing Phnom Penh on 17 April 1975, the regime led by Pol Pot emptied cities, abolished money, markets, schools, and religion, and pursued an agrarian-communist vision intended to restore a mythic "Year Zero." Roughly one quarter of Cambodia's population—commonly estimated at 1.5 to 2 million people—died from execution, forced labor, disease, and famine.

Targeted groups included perceived political enemies (former Lon Nol officials, intellectuals, urban residents labeled "New People"), as well as ethnic and religious minorities such as the Cham Muslims, ethnic Vietnamese, ethnic Chinese, and Buddhist monks. The regime's most notorious sites include the S-21 (Tuol Sleng) interrogation center in Phnom Penh and the killing fields of Choeung Ek.

The regime fell when Vietnamese forces invaded in late December 1978 and captured Phnom Penh on 7 January 1979, installing the People's Republic of Kampuchea. The Khmer Rouge continued an insurgency along the Thai border for years afterward, and—controversially—retained Cambodia's UN seat into the 1990s.

Accountability came slowly. The Extraordinary Chambers in the Courts of Cambodia (ECCC), a hybrid UN-Cambodian tribunal established by agreement in 2003, began trials in 2009. In 2018 the ECCC convicted Nuon Chea and Khieu Samphan of genocide against the Cham and ethnic Vietnamese—the first formal genocide convictions for the atrocities. Kaing Guek Eav ("Duch"), the commandant of S-21, was convicted in 2010 of crimes against humanity. Pol Pot himself died in 1998 without facing trial.

The case remains a touchstone in debates over transitional justice, the legal definition of genocide under the 1948 Genocide Convention, and the responsibilities of the international community.