United Nations Relief and Rehabilitation Administration (UNRRA, pronounced /ˈʌnrə/ UN-rə) was an international relief agency founded in November 1943 on the joint initiative of the United States, United Kingdom, USSR, and the Republic of China. 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". Of the aid, 70% originated with the United States, but 44 countries participated in the relief in Europe and Asia. It became part of the United Nations (UN) in 1945 and was dissolved in September 1948. 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.
UNRRA cooperated closely with dozens of volunteer charitable organizations, which sent hundreds of their own staff to work alongside UNRRA. In operation for only four years, the agency distributed about $4 billion worth of goods, food, medicine, tools, and farm implements at a time of severe global shortages and worldwide transportation difficulties. The recipient nations had been especially hard hit by starvation, dislocation, and political chaos. It played a major role in helping displaced persons return to their home countries in Europe in 1945–46.