Cambodia has a long-last and triumphant history since the 5th millennium BCE, passing many huge changes of politics as well as religion. History of Cambodia can be divided into 8 periods: pre-history, pre-Angkorian era and Angkorian era, dark ages of Cambodia, French colonization, Independence and Vietnam War, Khmer Republic, Khmer Rouge regime and Modern Cambodia.
Neutrality was the central element of Cambodian foreign policy during the 1950s and 1960s. By the mid-1960s, parts of Cambodia's eastern provinces were serving as bases for North Vietnamese Army against South Vietnam. Cambodia actively supported North Vietnamese Army in food and military bases.More info
While visiting Beijing in 1970, Sihanouk was ousted by a military coup led by Prime Minister General Lon Nol and Prince Sisowath Sirik Matak in the early hours of March 18, 1970. On October 9, the Cambodian monarchy was abolished, and the country was renamed the Khmer Republic. The new regime immediately demanded that the Vietnamese communists leave Cambodia, however, Vietnam rejected. American trMore info