The rise of Sihanouk

Cambodia became a constitutional monarchy under King Norodom Sihanouk. When French Indochina was given independence, Cambodia lost hope of regaining control over the Mekong Delta as it was awarded to Vietnam. There was in 1954 a conference agreement that established the International Control Commission (officially called the International Commission for Supervision and Control) in all the Indochinese countries. Made up of representatives from Canada, Poland, and India, it supervised the cease-fire, the withdrawal of foreign troops, the release of prisoners of war, and overall compliance with the terms of the agreement. This agreement also stipulated that general elections should be held in Cambodia during 1955 and that the International Control Commission should monitor them to ensure fairness. Sihanouk was more determined than ever to defeat the Democrats (who, on the basis of their past record, were expected to win the election).

Relationship with Vietnam

In 1955, Sihanouk abdicated in favour of his father to participate in politics and was elected prime minister. Upon his father's death in 1960, Sihanouk again became head of state, taking the title of prince. In 1967 Cambodia and the Democratic Republic of Vietnam established diplomatic relations.

As the Vietnam War progressed, Sihanouk adopted an official policy of neutrality in the Cold War. Sihanouk allowed the Vietnamese communists to use Cambodia as a sanctuary and a supply route for their arms and other aid to their armed forces fighting in South Vietnam. This policy was perceived as humiliating by many Cambodians. In December 1967 Washington Post journalist Stanley Karnow was told by Sihanouk that if the US wanted to bomb the Vietnamese communist sanctuaries, he would not object.