In the 1980s, Cambodia's economy relied heavily on multilateral aid and on bilateral economic assistance from Comecon countries. The largest donor was the Soviet Union, followed by Vietnam. East Germany, Czechoslovakia, Poland, Hungary, and Bulgaria sent mostly humanitarian aid, and they offered scientific and cultural assistance. Many Cambodian students received scholarships to study in these countries.
Western countries channeled aid through international organizations, including the International Committee of the Red Cross, the UN Children's Fund, and the Food and Agriculture Organization (FAO), the World Food Program (WFP), and the UN High Commissioner for Refugees. Private agencies that contributed to the rehabilitation of the Cambodian economy included Oxfam, the American Catholic Relief Services, the American Friends Service Committee, the Church World Service, the World Council of Churches, the Lutheran World Service, CARE, and the Coopération Internationale pour le Développement et la Solidarité (a European Roman Catholic group).
Data as of December 1987