The Khmer Rouge 'Red Khmer' a maoist group took up arms in 1967 against a rice tax. From 1970 hostilities extended throughout most of the country involving US and North Vietnamese forces?During 1973 leaving a civil war which continued with large-scale fighting between the Khmer Republic and the United National Cambodian Front including 'Khmer Rouge' communists supported by North Vietnam and China. Over 2 million Cambodian lives were lost between 1975 and 1979.This due to Communists harsh andhighlycentralizedregimemodeledonChinaGreatLeap Forward of Mao's 1958-1962 mass deaths30 Million
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Original: Key History of Cambodia: French, North Vietnam, China and USA interventionStMart