Aside from what is listed on various school curricula, my observation is that the average American has NOT learned much about the Russian/Soviet role in WWII.

Cold War revisionism certainly existed, not as a flat-out "whitewashing" or omission of any salient facts, but by a fairly studied de-emphasis of various embarrasssing details, particularly in regard to the USA's former ally which suddenly became the number-one enemy before the ink had dried on the peace treaties.

The more inquisitive and studious among us were able to learn about the European war's eastern front, and about the huge numbers of Soviet casualites (civilian and otherwise), but you could remain ignorant of all that and still pass the typical high-school or even college course.