United States

Truman, who had been chosen as vice president for domestic political reasons, was poorly prepared to assume the presidency. He had no experience of foreign affairs, knew little about Roosevelt’s intentions, and was intimidated by the giant shoes he now had to fill. His first decisions were dictated by events or plans already laid. In July, two months after the German forces surrendered, he met at Potsdam, Germany, with Stalin and Churchill (who was succeeded at the conference by Clement Attlee) to discuss future operations against Japan and a peace settlement for Europe. Little was accomplished, and there would not be another meeting between Soviet and American heads of state for 10 years.

Potsdam Conference; Truman, Harry S.; Churchill, Winston; Stalin, JosephPotsdam Conference, with U.S. President Harry S. Truman (centre), flanked by Soviet Premier Joseph Stalin (left) and British Prime Minister Winston Churchill (right), near Berlin, Germany, July 1945.U.S. Army Photo

Hopes that good relations between the superpowers would ensure world peace soon faded as a result of the Stalinization of eastern Europe and Soviet support of communist insurgencies in various parts of the globe. Events came to a head in 1947 when Britain, weakened by a failing economy, decided to pull out of the eastern Mediterranean. This would leave both Greece, where a communist-inspired civil war was raging, and Turkey to the mercies of the Soviet Union. Truman now came into his own as a national leader, asking Congress to appropriate aid to Greece and Turkey and asserting, in effect, that henceforth the United States must help free peoples in general to resist communist aggression. This policy, known as the Truman Doctrine, has been criticized for committing the United States to the support of unworthy regimes and for taking on greater burdens than it was safe to assume. At first, however, the Truman Doctrine was narrowly applied. Congress appropriated $400 million for Greece and Turkey, saving both from falling into unfriendly hands, and thereafter the United States relied mainly on economic assistance to support its foreign policy.

The keystone of this policy, and its greatest success, was the European Recovery Program, usually called the Marshall Plan. Europe’s economy had failed to recover after the war, its paralysis being worsened by the exceptionally severe winter of 1946–47. Thus, in June 1947 Secretary of State George C. Marshall proposed the greatest foreign-aid program in world history in order to bring Europe back to economic health. In 1948 Congress created the Economic Cooperation Administration and over the next five years poured some $13 billion worth of aid into western Europe. (Assistance was offered to Eastern-bloc countries also, but they were forced by Stalin to decline.) The plan restored economic vitality and confidence to the region, while undermining the local communist parties. In 1949 Truman proposed extending similar aid to underdeveloped nations throughout the world, but the resulting Point Four Program was less successful than the Marshall Plan. Experience showed that it was easier to rebuild a modern industrial economy than to develop one from scratch.

U.S. policy for limiting Soviet expansion had developed with remarkable speed. Soon after the collapse of hopes for world peace in 1945 and 1946, the Truman administration had accepted the danger posed by Soviet aggression and resolved to shore up noncommunist defenses at their most critical points. This policy, known as containment, a term suggested by its principal framer, George Kennan, resulted in the Truman Doctrine and the Marshall Plan, as well as in the decision to make the western zones of Germany (later West Germany) a pillar of strength. When the Soviet Union countered this development in June 1948 by blocking all surface routes into the western-occupied zones of Berlin, Britain and the United States supplied the sectors by air for almost a year until the Soviet Union called off the blockade. A logical culmination of U.S. policy was the creation in 1949 of the North Atlantic Treaty Organization (NATO), a military alliance among 12 (later 16) nations to resist Soviet aggression.

U.S. Secretary of State Dean Acheson signs the North Atlantic Treaty on April 4, 1949, as U.S. President Harry S. Truman (second from left) and Vice President Alben W. Barkley (left) look on.Encyclopædia Britannica, Inc.