Answer:
The answer is: That´s the Truman Doctrine.
Step-by-step explanation:
The Truman Doctrine is a foreign policy conception formulated by president Harry Truman in 1947. It was designed in order to oppose and contain Communist expansion around the world. It was a major development in the US geopolitical strategic thinking. Truman´s diplomatic strategy was a major reorientation of American foreign policy which had traditionally advocated taking distance from regional conflicts and involvement. The Truman Doctrine says that the US will provide all types of assistance to any nation threatened by internal or external authoritarian forces.