In the May 1993 elections, Norodom Ranariddh's FUNCINPEC won 58 of the 120 available seats in the National Assembly; Hun Sen's Cambodian People's Party came second. Sen, who was backed by the Vietnamese, refused to acknowledge defeat. Sihanouk negotiated the formation of a coalition government between the two parties, introducing a system whereby Cambodia would have two prime ministers, Ranariddh and Sen. The new Cambodian National Army then launched an offensive against the Khmer Rouge. By August, it had captured Phnom Chhat, with Pol Pot fleeing back into Thailand. The Khmer Rouge launched a counter-offensive, having regained much of the territory they recently lost by May 1994. Pol Pot moved to Anlong Veng, but as that was overrun in 1994 he relocated to Kbal Ansoang, on the crest of the Dangrek Mountains. The Khmer Rouge nevertheless faced growing levels of desertion over the first half of the 1990s.