What basic idea is behind the Truman Doctrine?
Because of Russian expansion to the west, a policy carried on by the Soviets, it would be impossible to come to a quick settlement with Stalin, following the Second World War. Since the Russians would test the US by a cautious expansion and not start a major war, Truman developed the Truman Doctrine, with the aid of George Kennan. This Doctrine provided military and financial aid to all the nations that agreed to resist any attempt by Russia to take them over. It was first applied in Greece and Turkey.
