What was the Truman doctrine about

The Truman doctrine was an American foreign policy in which its purpose was to counter Soviet geopolitical expansion during the cold war.

The Truman Doctrine was an American foreign policy whose stated purpose was to counter Soviet geopolitical expansion during the Cold War. It was first announced to Congress by President Harry S. Truman on March 12, 1947 and further developed on July 12, 1948 when he pledged to contain threats to Greece and Turkey.