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.
When was Vietnam a success exactly? Thousands of people who should have had nothing to with the countries civil war jumped in due to a fear of communism and then the Vietnamese kicked our asses, that's what I learned. I learned a lot about The Great Depression, Roaring Twenties and Dust Bowel (because for some reason American History is part of Australian History classes...). What I would really like people to be more educated about is the Cold War (the unbiased version not the "Oh no the Russians have nukes" version or the "Oh the Americans have nukes" version". People need to learn about what happened in that period so tensions don't get that high again.