Sihanouk, Son Sann decided to form a coalition government with the Khmer Rouge. On 22 June 1982, leaders of the three organizations formalised the formation of their coalition government by signing a Thai-sponsored agreement which established the Coalition Government of Democratic Kampuchea (CGDK). Accordingly, the CGDK's Inner Cabinet consisted of Sihanouk as the President of Democratic Kampuchea, Khieu Samphan as the Vice-President in charge of foreign affairs and Son Sann as Prime Minister. Below the Inner Cabinet were six separate committees responsible for national defence, economy and finance, social affairs and public health, military affairs and the media. During a meeting between Kim Il-sung and Sihanouk on 10 April 1986, in Pyongyang, Kim Il-Sung reassured Sihanouk that North Korea would continue to regard him as the legitimate head of state of Kampuchea. By 1987, Democratic Kampuchea still held its membership at the UN General Assembly, even though it lacked four criteria of statehood: people, territory, government, and supreme authority within the borders of a country. In spite of those limitations, forces of the three armed factions within the CGDK continued to fight the Vietnamese to achieve their objective of "bring[ing] about the implementation of the International Conference on Cambodia and other relevant UN General Assembly resolutions". Vietnamese reform and withdrawal When the Vietnamese leaders launched their invasion of Kampuchea to remove the Khmer Rouge government in 1978, they did not expect a negative reaction from the international community. However, the events that followed the invasion showed that they had severely miscalculated international sympathies toward their cause. Instead of backing Vietnam, most United Nations member countries, including their fellow communist states in Asia like China and North Korea, denounced the Vietnamese use of force against Kampuchea, and even moved to revive the battered Khmer Rouge organisation that had once governed the country with such brutality. Thus, Kampuchea became more than just a military problem for Vietnam, quickly evolving into an economic and diplomatic problem in the international arena. Throughout the decade in which Vietnam occupied neighbouring Kampuchea, the Vietnamese Government, and the PRK government which it installed, were placed on the periphery of the international community. The international community's political stance towards Kampuchea had a severe impact on the Vietnamese economy, which was already wrecked by decades of continuous conflicts. The United States, which already had sanctions in place against Vietnam, convinced other countries of the United Nations to deprive Vietnam