The significant policy enacted during the Cold War to contain communism was the Truman Doctrine, articulated in 1947. This policy aimed to counter Soviet geopolitical expansion by providing political, military, and economic assistance to countries resisting communism. Initially focusing on Greece and Turkey, the Truman Doctrine marked a turning point in American foreign policy, leading to increased U.S. involvement in global affairs. This doctrine laid the groundwork for future initiatives, such as the Marshall Plan, to aid European recovery post-World War II. The doctrine's principles shaped U.S. strategies throughout the Cold War era, emphasizing the fight against communism.