The Truman Doctrine was a policy of the United States government that was designed to prevent the spread of communism during the Cold War.

The main strategy of containment was to build up military forces to deter Soviet aggression.

The United States provided economic and military aid to Arctic countries to prevent them from falling under Soviet influence, established military bases in the Arctic to deter Soviet aggression, and negotiated with the Soviet Union to reduce tensions in the Arctic.

Bluie West One was the name of the American military base that was established in Greenland in 1943.

Elmendorf Air Force Base was the name of the American military base that was established in Alaska in 1947.

Goose Bay Air Force Base was the name of the American military base that was established in Canada in 1951.

Keflavik Air Base was the name of the American military base that was established in Iceland in 1951.

Bodø Air Station was the name of the American military base that was established in Norway in 1955.

Thule Air Base was the name of the American military base that was established in Denmark in 1957.

Camp Century was the name of the American military base that was established in Greenland in 1961.

Fort Greely was the name of the American military base that was established in Alaska in 1965.

CFS Alert was the name of the American military base that was established in Canada in 1968.

Naval Air Station Keflavik was the name of the American military base that was established in Iceland in 1973.

Bodø Air Station was the name of the American military base that was established in Norway in 1979.

Thule Air Base was the name of the American military base that was established in Denmark in 1985.