Yes, Cambodia did erupt in a civil war. The Cambodian Civil War began in 1967 and lasted until 1975 when the Khmer Rouge, a communist guerrilla movement, took control of the country and established the Democratic Kampuchea regime. The war was marked by intense fighting between the Khmer Rouge and the Cambodian government forces, as well as between the Khmer Rouge and other factions, such as the Lon Nol government and the FUNCINPEC. The war resulted in the deaths of millions of Cambodians and significant destruction to the country's infrastructure and economy.