Passage: Sihanouk was convinced that the PRC, not the U.S., would eventually control the Indochinese Peninsula and that "our interests are best served by dealing with the camp that one day will dominate the whole of Asia – and coming to terms before its victory – in order to obtain the best terms possible."During the same year, however, he allowed his pro-American minister of defense, General Lon Nol, to crack down on leftist activities, crushing the Pracheachon by accusing its members of subversion and subservience to Hanoi. Simultaneously, Sihanouk lost the support of Cambodia's conservatives as a result of his failure to come to grips with the deteriorating economic situation (exacerbated by the loss of rice exports, most of which went to the PAVN/Viet Cong) and with the growing communist military presence.On 11 September 1966, Cambodia held its first open election. Through manipulation and harassment (and to Sihanouk's surprise) the conservatives won 75 percent of the seats in the National Assembly. Lon Nol was chosen by the right as prime minister and, as his deputy, they named Prince Sirik Matak; an ultraconservative member of the Sisowath branch of the royal clan and long-time enemy of Sihanouk. In addition to these developments and the clash of interests among Phnom Penh's politicized elite, social tensions created a favorable environment for the growth of a domestic communist insurgency in the rural areas.

Question: Who was on Nol's deputy?
Prince Sirik Matak