The Khmer Republic is proclaimed in Cambodia. In March, a coup led by Cambodian General Lon Nol had overthrown the government of Prince Norodom Sihanouk in Phnom Penh. Between 1970 and 1975, Lon Nol and his army, the Forces Armees Nationale Khmer (FANK), with U.S. support and military aid, fought the Communist Khmer Rouge for control of Cambodia. During those five years of bitter fighting, approximately 10 percent of Cambodia’s 7 million people died. When the U.S. forces departed South Vietnam in 1973, both the Cambodians and South Vietnamese found themselves fighting the Communists alone. Without U.S. support, Lon Nol’s forces succumbed to the Khmer Rouge in April 1975. The Khmer Rouge promptly evacuated Phnom Penh and set about to reorder Cambodian society, which resulted in a killing spree and the notorious “killing fields.” Under the brutal rule of the Khmer Rouge, hundreds of thousands of Cambodians were murdered or died from exhaustion, hunger, and disease.