The Killing Fields (1984) is a powerful and heartbreaking drama about the devastating effects of the Khmer Rouge regime in Cambodia during the late 1970s. Directed by Roland Joffé and starring Sam Waterston, Haing S. Ngor, and John Malkovich, the film follows
From Wikipedia
The Killing Fields are a network of sites in Cambodia where large numbers of people were executed and buried by the Khmer Rouge regime during the period of Democratic Kampuchea from 1975 to 1979. The killings formed part of the Cambodian genocide, in which an estimated 1.7 to 2.2 million people died through execution, forced labour, starvation, and disease under the rule of the Communist Party of Kampuchea led by Pol Pot.