What doctrine did President Truman articulate to counter Soviet influence after World War II?

• A. The Monroe Doctrine
• B. The Truman Doctrine
• C. The Containment Doctrine
• D. The Eisenhower Doctrine

Answer: (B)

Countering Soviet influence after World War II required a clear, actionable policy that would support countries resisting subjugation by outside pressure. The main idea being tested is how the United States defined its response to communist expansion. In 1947, President Harry S. Truman articulated a plan to aid free peoples facing subjugation, offering political, military, and economic assistance to stop the spread of communism. This formal policy is the Truman Doctrine. It specifically framed U.S. support for nations like Greece and Turkey and set the tone for the broader strategy of containment that guided Cold War diplomacy. The Monroe Doctrine is a 19th‑century policy about European interference in the Americas, not postwar Europe. The Eisenhower Doctrine is a later policy focused on the Middle East, while containment describes the overall approach rather than a policy named after Truman.