Well, I can’t remember much of high school (it was like, 6 years ago for me), though I do recall that the US History class that I took via correspondance (fun story, that one) to complete my graduation requirements was fairly detailed up to around the end of Vietnam, where it quickly became thinner and thinner until it had a brief mention of Clinton recently being elected President (I took the class in 2001, of course).
When I took a US Military History class in college (covering from the late 1600’s until the end of Vietnam), the professor explained that most US history classes don’t cover anything much later than Vietnam because, from a historical standpoint, it’s not history yet. Or at least, not history in a way that is well-enough understood to start teaching it in classrooms. In any case, I can tell you where Vietnam is, the fact that they use a tonal language (which is a pain in the ass for Western speakers like me, as I have recently discovered while studying Mandarin Chinese), and a number of the major campaigns (though the only ones I took great enough interest in to remember are the Ia Drang Valley campaign and the Tet Offensive, along with some of the air campaigns such as Rolling Thunder and the Linebacker raids).
That said, I consider myself to be rather well-read on things outside of the US, but I’m a geek anyways. That said, I didn’t know Ireland had it’s own language until I was in college, nor did I know that Yiddish and Hebrew were different languages until my junior year of high school. The thing about Indonesia I didn’t know, but I’ve still yet to have anyone explain to me why I care about Indonesia’s religious breakdown aside from that fact that quite a bit of our maritime trade goes past Indonesia via the Strait of Malacca, and that piracy is a problem there. I can point Iraq on a map to you, but I wasn’t able to properly visualize where Afghanistan was in relation to Iraq until some time in 2003 or 2004.
That said, finally linking up the locations of Iraq, Afghanistan, Iran, and Russia all together in my head does give a better contextual understanding to how various countries act when dealing with eachother. Of course, since I’m in the Air Force, knowing what’s going on in various hard to pronounce areas in the world is probably more pertinent to me than it is to say, my friend in Huntsville whose main interests are microbiology and Paul McCartney (or, as she prounces his name: “sigh**PAULMCCARTNEY!”, since unlike her, I’m fairly likely to be writing post cards from such places in the forseeable future.
As for knowing the location of countries in Europe and Africa being more important than the locations of Michigan (it’s the state shaped more or less like your right hand, IIRC), and Texas (for the last freaking time, we’re NOT PART OF THE SOUTH), states in the US can and do often have rather differing cultures, though we at least usually speak something close to the same language. Whether or not it’s terribly important that your average Californian be able to find Michigan or New York or Kentucky, they may very well be more likely to have to go to one of those places than, say, Lithuania, Kenya, Taiwan, or Indonesia.
Now, I want to know if your typical tourist at Euro-Disney can find the location of Washington, D.C. and tell me the official language of the State of Texas. Or, for that matter, if they happen to know what the religion of the majority of Indonesia is.