Cambodian Genocide

The Cambodian Genocide was one of the most extreme episodes of state-organized mass murder in the 20th century. Under the Khmer Rouge (Communist Party of Kampuchea) government of Pol Pot, which ruled Cambodia from April 1975 to January 1979, an estimated 1.5 to 2 million people died — representing approximately 25% of Cambodia's pre-war population of around 7 million.

The Khmer Rouge captured Phnom Penh on April 17, 1975 after a five-year civil war supported by US bombing campaigns (1969–1973) that had killed tens of thousands of Cambodians and destabilized the country. Within days of seizing power, Pol Pot's regime declared "Year Zero" — the starting point of a revolutionary new order that sought to erase all existing social structures and create a purely agrarian communist utopia. The entire urban population of Phnom Penh — approximately 2 million people — was forcibly marched into the countryside within days, on pain of death. Hospitals were emptied; patients on intravenous drips were pushed into the streets.

The new regime abolished money, markets, schools, hospitals, religion, and private property. Wearing glasses or speaking a foreign language could be grounds for execution on suspicion of being an "intellectual." Buddhist monks — approximately 60,000 of them — were defrocked and either executed or forced to labor; the vast majority of Cambodia's temples were destroyed or converted to prisons. Ethnic Chinese, Vietnamese, and Cham Muslims were targeted for elimination. Urban Cambodians were classified as "new people" — unreliable — and subjected to systematic discrimination, forced labor, starvation, and killing.

The killing apparatus centered on a network of prisons and execution sites. The most notorious was S-21 (Tuol Sleng) in Phnom Penh, where an estimated 17,000 people were tortured and executed; only a handful survived. The "killing fields" — Choeung Ek being the most famous — were execution sites where prisoners were brought by truck at night and killed to save bullets (with farming implements, bamboo poles, or sharp palm fronds), then thrown into mass graves. Forensic excavations have uncovered hundreds of mass grave sites across Cambodia.

The regime was brought down in January 1979 when Vietnamese forces — responding to repeated Khmer Rouge border attacks on Vietnam — invaded and captured Phnom Penh in two weeks. Pol Pot and the Khmer Rouge fled to the jungle near the Thai border, where they continued as an insurgency for nearly two decades, inexplicably retaining Cambodia's UN seat until 1982. Pol Pot died in 1998, having never faced international justice. The Extraordinary Chambers in the Courts of Cambodia (ECCC) — a hybrid Cambodian-international tribunal — finally began trials in 2009; senior Khmer Rouge leaders Nuon Chea and Khieu Samphan were convicted of genocide in 2018.