The Vietnam War experience can’t tell us anything about the war in Iraq – or so it is said. If you believe that, trying looking through this lens, and you may change your mind.
The Vietnam War had three phases. The War in Iraq has already completed an analogous first phase, is approaching the end of the second phase, and shows signs of entering the third.
Phase One in Vietnam lasted from 1961 until the Congress passed the Tonkin Gulf Resolution in March 1965, authorizing deployment of large U.S. combat forces in South Vietnam. It began with hesitation and a gross misreading of American strategic interests. It concluded with the U.S. use of phony intelligence that made it seem that North Vietnamese patrol boats had attacked U.S. ships in the Tonkin Gulf without provocation.
President Kennedy was ambivalent about deeper involvement, but some of his aides believed that a North Vietnamese takeover of the south would bring Sino-Soviet dominion over all of Southeast Asia. They paid little attention to the emerging Sino-Soviet split, which the Intelligence Community was reporting in the early 1960s. Accordingly, the “containment of China” became their goal, their rationale for U.S. strategic purpose – that is, not allowing the Soviet Bloc to expand in this region.
http://www.commondreams.org/views06/0309-20.htm