Nico Nico Nii!~
This is probably an exception to the norm, but my education on Vietnam was as follows, and this is definitely the personal bias of my history teacher coming into play: it was a military success, at least for the first couple of years, but a failure on the homefront. It was an unpopular war that wasn't even initially our problem - we quietly took the torch of the war from France after they withdrew in 1955, and the only thing we did until 1965 was to prop up our puppet state that was in the southern half of Vietnam, lest the Chinese overrun it and "infest" it with that vile thing called communism! ( ;P)
One other thing that doesn't get talked about at all, really, is the economic depressions and panics that happened in the US prior to the Great Depression, as well as between then and the 1980s.