In 1975, the Communist Party Khmer Rouge came to power in Cambodia, and began a series of measures to eliminate their perceived internal opponents and to transform their country into an agrarian-based, communist society. Pol Pot, the leader of the Khmer Rouge, tried to cleanse Cambodian society along racial, social, religious and political lines. They would eventually be overthrown by a foreign army, but only after they had killed 1.5 to 3 million people.