Was Harry S Truman's foreign policy a success?

Marshall, in turn, was succeeded by Dean G. Acheson, a former undersecretary of state, in 1949. Marshall and Acheson proved inspired leaders and sometimes brilliant architects of United States foreign policy. Truman also reorganized the nation's military and national security apparatus with passage of the National Security Act in 1947. read more

Truman’s foreign policy, firstly, relied upon the Truman Doctrine. The Truman Doctrine was a policy that meant the US would end its policy of isolationism and would take a stand against Soviet expansionism and would be prepared to use economic, diplomatic and military force to prevent the spread of communism. read more

Truman's second major decision in foreign relations was to change the American stance in international affairs from abstention to participation, a decision that reversed the long-standing policy advocated by George Washington. read more