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This Day in American History

May 22

1 historic event on this date

Legislation1947

Truman Doctrine Aid Approved

President Truman signed the bill authorizing $400 million in military and economic aid to Greece and Turkey to counter Soviet influence, implementing the Truman Doctrine. This commitment marked a major shift in American foreign policy toward active global engagement during the Cold War.

Why It Matters

The Truman Doctrine established the principle of containment that guided American foreign policy for decades, raising fundamental questions about the role of a republic in maintaining international order.

Explore the Principles Behind the History

Every event in American history connects to the founding principles. Discover the ideas that shaped these moments.

View the 28 Founding Principles