The Truman Doctrine was the impetus for the change in United States foreign policy, from isolationist to internationalists; thus we were drawn into two wars of containment and into world affairs. The Truman Doctrine led to a major change in U.S. foreign policy from its inception - aid to Turkey and Greece - to its indirect influence in Korea and Vietnam. The aftermath of World War II inspired the U.S. to issue a proclamation that would stem Communist influence throughout the world. However, our zeal in that achievement sent our soldiers to die in Vietnam and Korea for a seemingly futile cause. It must be the policy of the U.S. to support free peoples. This is no more than a frank recognitions that totalitarian regimesimposed on free peoples . . .undermine the foundations of . . . peace and security of the United States. The Truman Doctrine would change the foreign policy of the United States and the world. This policy would first go in aid tosupport the democratic regimes in Turkey and Greece. These nations were being threatened by Soviet-supported rebels seeking to topple the government and install a Communist regime. The Soviets were also making extreme territorial demands especially concerning the Dardanelles. A direct influence of this Doctrine was, of course, the Marshall Plan. The Marshall Plan was designed to give aid to any European country damaged during World War II. It tremendously helped ravaged European nations such as Italy and France. By helping them economically, the Marshall Plan indirectly helped to stem growingCommunist sentiment in these countries. The process whereby the Truman Doctrine came to fruition was a long and arduous one. After World War II, the Soviet Union and the United States stood at the pinnacle of world power. By the late '40's, the U.S.S.R. had caught up to the United States' nuclear weapons programs. In addition, they were very land-hungry. Throughout Russia's histo...