How a delicate balancing act collapsed into the brutal Cambodian Civil War
Prince Norodom Sihanouk once kept Cambodia neutral amidst the Vietnam War, but his political maneuvering backfired. By alienating both conservatives and communists, he triggered a coup in 1970. This power vacuum allowed a small guerrilla movement, the Khmer Rouge, to seize control of the nation through five years of devastating conflict.
In the 1960s, Prince Norodom Sihanouk maintained Cambodia's neutrality by balancing domestic leftist opposition with conservative interests. However, by 1966, he had permitted North Vietnamese forces to use eastern border regions as sanctuaries. This decision, combined with economic instability and the illegal sale of rice to communist forces, alienated his conservative base. In 1966, the conservative wing of the Sangkum party won 75 percent of the National Assembly seats, leading to the appointment of Lon Nol as prime minister. Tensions peaked in 1967 during a peasant rebellion in Battambang, which Sihanouk suppressed with extreme force, driving thousands of recruits into the ranks of the Khmer Rouge.
The situation reached a breaking point in March 1970 while Sihanouk was abroad. Lon Nol, supported by the National Assembly, deposed the prince and established a pro-American government. This shift prompted the North Vietnamese to invade, capturing nearly one-third of the country and empowering the Khmer Rouge. The United States, seeking to protect South Vietnam and buy time for withdrawal, launched massive aerial bombing campaigns. Between 1970 and 1975, these strikes and the ongoing civil war caused a massive refugee crisis, with Phnom Penh's population swelling from 600,000 to nearly 2 million as people fled the countryside.
The conflict ended on 17 April 1975, when the Khmer Rouge captured Phnom Penh. The new regime, later named Democratic Kampuchea, immediately emptied the cities and initiated a radical social transformation. Under the leadership of Pol Pot, the Khmer Rouge abolished private property, money, and markets. Between 1975 and 1979, an estimated 1.5 million people—roughly 20 percent of the population—died from starvation, overwork, disease, or execution. This period of state-sponsored violence, known as the Cambodian genocide, remains one of the deadliest events in modern history, characterized by the regime's literal and brutal implementation of Maoist-inspired collectivization.
Source: Cambodian Civil War
