Answer:
The U.S. strategy throughout the Cold War to isolate and weaken the Soviet Union by using a variety of policies to prevent the geographic spread of communism is known as containment.
Step-by-step explanation:
The containment doctrine was intended to contain the growth of the influence of the USSR and later also China by preventing the expansion of communism in the world. Theoretical principles of containment policy were created by George Kennan in an anonymous article from 1947.
Kennan's main goal of US policy was to prevent the spread of communism to countries by creating a system of military alliances. Containment was one of the main goals of Truman's doctrine, and its effect, among others, were the creation of NATO (1949), ANZUS (1951), SEATO (1954) and CENTO (1955).
In the 1960s, in connection with the popularization of the domino effect theory, the use of the containment doctrine was also extended to support for pro-American governments around the world (including military regimes).