@parados,
To dispel any confusion you may have about Vietnam, Parados, JFK greatly expanded our small numbers of military advisors in 1961, including Special Forces, but not until the Gulf of Tonkin incident and following did LBJ singlehandedly expand it into a full blown war, with peak U. S. military involvement of over 500,000 in 1968, before Nixon ever took office. Once Nixon took office in 1969, troop levels subsided, the war was not expanded, and troop levels subsided in 69, 70, 71, etc. until the close of the war. We were down to 156,000 troops in 1971 and 24,000 in 72, and by the time the war was finally over in 75, we had been long gone. Nixon was not in office 6 months when he proposed a peace plan. He talked about being a peacemaker at his inauguration. Nixon's whole operation was designed to figure out a way to get out of the country with some self respect and semblance of order to it, and try to give South Vietnam every reasonable chance to defend itself.
http://www.landscaper.net/timelin.htm#time%20line
http://wiki.answers.com/Q/U.S._Troop_levels_in_Vietnam_War
LBJ clearly bears all responsibility for expanding the war to what it was, before Nixon began to change policies there and to pursue an orderly plan and withdrawal, which involved various tactics that may have been different than LBJ's in some respects from time to time, negotiations, etc. It wasn't entirely pretty, but he got us out, and there is no way Nixon should be described as expanding the war.
You can argue that he expanded a certain tactic in the war, such as specific operations into Cambodia, or bombings in different areas, but that is not the same as expanding the war, as it is also obvious that other operations were curtailed. The emphasis of the war or tactics were varied from what they had been to some extent, but it seems clear that troop reductions were taking place and the overall troop or military involvement was winding down. Some of those operations were designed I think to try to apply pressure to some of the so called peace talks in the works, release of prisoners, etc.