In the United States, at least where Ive gone to school, we barely get to World War II, much less cover it, and honestly, I don't see where we'd have time to cover such things.
We split US history here from 1877 onwards for highschool. Thats a lot of stuff to cover considering how the topics are usually covered, from the gilded age, populism (Wizard of Oz), Spanish-American War, progressivism (The Jungle), World War I (All Quiet on the Western Front), the Roaring Twenties (The Great Gatsby), The Great Depression (Of Mice and Men, or something equally depressing), World War II, Cold War, McCarthyism, Korea, Vietnam...
as you can see, there just isnt enough time to hit on something as dense as World War II... especially with five generally expected books to be read by apathetic teenagers anyway
I'd much rather see this broken up at 1917, and continued in another class, but with World History and World Geography requirements put in there... its hard to make room.
Speaking of which, being a history major in college, I've noticed quite the complaint in general of lack of study in mid 20th century events. Its only been 50-60 years and everything of World War 2 has yet to be fleshed out... perhaps it will trickle down as more and more focus is placed on the subject... theres not even a WW2 or Vietnam class for my college... but we have two Civil War classes!