of the city where Khmer Rouge cadres searched marchers and removed many of their belongings. The march took place in the hottest month of the year and an estimated 20,000 people died along the route. For the Khmer Rouge, emptying Phnom Penh was considered as demolishing not just capitalism in Cambodia, but also Sihanouk's power base and the spy network of the U.S. Central Intelligence Agency (CIA). This dismantling facilitated Khmer Rouge dominance over the country and enabled driving the urban population toward agricultural production. Leader of Kampuchea Establishing the new government: 1975 On 20 April 1975, three days after Phnom Penh fell, Pol Pot secretly arrived in the abandoned city. Along with other Khmer Rouge leaders, he based himself in the railway station, which was easy to defend. In early May, they moved their headquarters to the former Finance Ministry building. The party leadership soon held a meeting at the Silver Pagoda, where they agreed that raising agricultural production should be their government's top priority. Pol Pot declared that "agriculture is key both to nation-building and to national defence"; he believed that unless Cambodia could develop swiftly then it would be vulnerable to Vietnamese domination, as it had been in the past. Their goal was to reach 70 to 80% farm mechanisation in five to ten years, and a modern industrial base in fifteen to twenty years. As part of this project, Pol Pot saw it as imperative that they develop means of ensuring that the farming population worked harder than before. The Khmer Rouge wanted to establish Cambodia as a self-sufficient state. They did not reject foreign assistance altogether, although they regarded it as pernicious. While China supplied them with substantial food aid, this was not publicly acknowledged. Shortly after the taking of Phnom Penh, Ieng Sary travelled to Beijing, negotiating the provision of 13,300 tons of Chinese weaponry to Cambodia. At the National Congress meeting in April, the Khmer Rouge declared that it would not permit any foreign military bases on Cambodian soil, a threat to Vietnam, which still had 20,000 troops in Cambodia. To quell tensions arising from recent territorial clashes with Vietnamese soldiers over the disputed Wai Island, Pol Pot, Nuon Chea, and Ieng Sary travelled secretly to Hanoi in May, where they proposed a Friendship Treaty between the two countries. In the short term, this successfully eased tensions. After Hanoi, Pol Pot proceeded to