After the Khmer Rouge regime was overthrown, a new Cambodian government supported by Vietnam, the People's Republic of Kampuchea (PRK), was established. The Chinese leader, Deng Xiaoping, was unhappy with Vietnam's influence over the PRK government. Deng proposed to Sihanouk that he co-operate with the Khmer Rouge to overthrow the PRK government, but the latter rejected it, as he opposed the genocidal policies pursued by the Khmer Rouge while they were in power. In March 1981, Sihanouk established a resistance movement, FUNCINPEC which was complemented by a small resistance army known as (ANS). He appointed In Tam, who had briefly served as Prime Minister in the Khmer Republic, as the commander-in-chief of ANS. The ANS needed military aid from China, and Deng seized the opportunity to sway Sihanouk into collaborating with the Khmer Rouge. Sihanouk reluctantly agreed, and started talks in March 1981 with the Khmer Rouge and the Son Sann-led Khmer People's National Liberation Front (KPNLF) on a unified anti-PRK resistance movement.