Cambodian government positions in Prak Ham, 40 miles north of Phnom Penh, and the 4,000-man base at Taing Kauk are the targets of continuous heavy bombardment by communist forces.
The communist Khmer Rouge and their North Vietnamese allies were trying to encircle the capital city.
Premier Lon Nol took over the government from Prince Norodom Sihanouk in March 1970, and Lon Nol's troops were locked in a desperate battle with the communists. Despite U.S. air support, the Cambodian government troops were under heavy pressure from the communists. The Prak Ham siege was lifted four days later, but the communists continued to encircle Phnom Penh in the face of weakened Cambodian resistance. Meanwhile, antigovernment demonstrations against the Lon Nol regime broke out inside the capital. The government reacted by banning all such protests, as well as political meetings, and by authorizing police searches of private houses.
Despite the unrest in Phnom Penh and a series of major defeats, Lon Nol managed to retain control of the government. Lon Nol's government troops managed to hold on largely because of U.S. support. However, with the signing of the Paris Peace Accords in January 1973, American forces were withdrawn from Southeast Asia, and Lon Nol's forces soon found themselves fighting alone against the communists.
The last U.S. airstrikes flown in support of Cambodian forces were in August 1973. Lon Nol and his forces fought on, but with no external support, it was an overwhelming task. On April 17, 1975, Lon Nol's greatly depleted forces surrendered to the Khmer Rouge. During the five years of war, approximately 10 percent of Cambodia's 7 million people died. The victorious Khmer Rouge emptied the cities and forced millions of Cambodians into forced labor camps, murdered hundreds of thousands of real or imagined opponents, and caused hundreds of thousands of deaths from exhaustion, hunger, and disease.