U.S. Foreign Policy Changes from WWII to the Cold War

Evaluate the extent to which the United States' foreign policy shifted during the period from the end of World War II (1945) to the end of the Cold War (1991). In your response, analyze the accompanying documents and incorporate relevant outside evidence to support your argument.

Document 1: A speech by President Harry S. Truman announcing the Truman Doctrine in 1947.

Document 2: Excerpts from the 1950 NSC-68 report advocating for containment policy.

Document 3: An excerpt from President Lyndon B. Johnson's address to Congress in 1964 regarding U.S. involvement in Vietnam.

Document 4: A segment of President Ronald Reagan's speech from 1987 calling for nuclear disarmament and addressing the Soviet Union.