What documents affected U.S foreign policy?

Several key documents have significantly influenced U.S. foreign policy throughout history. The Monroe Doctrine (1823) established a framework for U.S. intervention in the Americas, asserting opposition to European colonialism. The Truman Doctrine (1947) marked the beginning of the Cold War, committing the U.S. to counter Soviet influence globally. Additionally, the National Security Strategy documents, particularly since the late 20th century, have outlined U.S. strategic priorities and approaches to international relations.