Books can be, and have been, written on this subject. There are many particular reasons why the United States chose to involve itself in the region. The most primary reason would be the fear of Communism. When the French were thrown out of Vietnam following World War II, the region ended up becoming two nations. The Communist North Vietnam was set against the South. North Vietnam, in an attempt to gain its own freedom, set their lot with the Russians because the French forces that sought to control the region were supported by the British and Americans, as per World War II alliances. The perception of the North was fed by the "domino theory," which asserted that in the fight for world supremacy, if one region of the world fell to the Communists, the entire region would go Communist. With this belief underscoring US policy in the region, America saw Vietnam as a conflict between freedom and democracy versus repression and Communism. We now understand that this was not entirely the case. When Ho Chi Minh stands in front of half a million Vietnamese and paraphrases Jefferson's "Declaration of Independence," we grasp the fact that the Vietnamese simply wanted freedom from being controlled. Their history of being run by other nations (French, Japanese, Chinese, Mongols) warranted them to be hesitant and fearful of outside nations, applying to both the Americans and the Russians. Yet, this was not what was fully embraced at the time. The fear of Communism, and the belief that the Russians were truly "out to get" the United States helped to feed the idea that infiltration of the North Vietnamese and defeating them was the only way to protect the interests of the United Sates. When South Vietnamese President Diem is praised by Vice President Johnson as "our boy out there," it is a statement that Americans truly believed the North Vietnamese were a threat to be defeated in the nation's Cold War ideological beliefs against Communism.