Nol was appointed the Army Chief of Staff in 1955, and commander-in-chief of the armed forces in 1960, as well as serving as Defence Minister. At the time, he was a trusted supporter of Sihanouk, his police being instrumental in the suppression of the small, clandestine communist movement in Cambodia. He was appointed deputy Premier in 1963. While Sihanouk, in an attempt to distance his country from the effects of the Vietnam War, was pursuing a foreign policy of "extreme neutrality", which involved association with China and toleration of North Vietnamese activity on the eastern borders, Nol remained friendly towards the United States, and indicated that he regretted the ending of US aid after 1963.