U.S. President Harry S. Truman issues an executive order giving World War II refugees precedence in visa applications under U.S. immigration quotas.

Harry S. Truman was the 33rd president of the United States, serving from 1945 to 1953. As the 34th vice president in 1945, he assumed the presidency upon the death of Franklin D. Roosevelt that year. Subsequently, Truman implemented the Marshall Plan in the aftermath of World War II to rebuild the economy of Western Europe, and established both the Truman Doctrine and NATO to contain the expansion of Soviet communism. A member of the Democratic Party, he proposed numerous New Deal coalition liberal domestic reforms, but few were enacted by the conservative coalition that dominated the United States Congress.

An executive order is a directive issued by the head of state or government that manages the operations of a nation's federal administration. While the structure and authority of executive orders vary by country, they generally allow leaders to direct government agencies, implement policies, or respond to emergencies without new legislation. In many systems, the legality of such orders is subject to constitutional or legislative limits and judicial oversight. The term is most prominently associated with presidential systems such as that of the United States, where executive orders carry legal weight within the president's administration.

Mass evacuation, forced displacement, expulsion, and deportation of millions of people took place across most countries involved in World War II. The Second World War caused the movement of the largest number of people in the shortest period of time in history. A number of these phenomena were categorised as violations of fundamental human values and norms by the Nuremberg Tribunal after the war ended. The mass movement of people – most of them refugees – had either been caused by the hostilities, or enforced by the former Axis and the Allied powers based on ideologies of race and ethnicity, culminating in the postwar border changes enacted by international settlements. The refugee crisis created across formerly occupied territories in World War II provided the context for much of the new international refugee and global human rights architecture existing today.