United Nations Relief and Rehabilitation Administration was an international relief agency, largely dominated by the United States but representing 44 nations. Founded in November 1943, it was dissolved in September 1948. it became part of the United Nations in 1945. Its purpose was to "plan, co-ordinate, administer or arrange for the administration of measures for the relief of victims of war in any area under the control of any of the United Nations through the provision of food, fuel, clothing, shelter and other basic necessities, medical and other essential services". Its staff of civil servants included 12,000 people, with headquarters in New York. Funding came from many nations, and totalled $3.7 billion, of which the United States contributed $2.7 billion; Britain, $625 million; and Canada, $139 million.

The Marshall Plan was an American initiative enacted in 1948 to provide foreign aid to Western Europe. The United States transferred $13.3 billion in economic recovery programs to Western European economies after the end of World War II. Replacing an earlier proposal for a Morgenthau Plan, it operated for four years beginning on April 3, 1948, though in 1951, the Marshall Plan was largely replaced by the Mutual Security Act. The goals of the United States were to rebuild war-torn regions, remove trade barriers, modernize industry, improve European prosperity and prevent the spread of communism. The Marshall Plan proposed the reduction of interstate barriers and the economic integration of the European Continent while also encouraging an increase in productivity as well as the adoption of modern business procedures.