I'm very fuzzy on anything before High Middle Ages, and what I know from then to, oh, early 20th stems from "placing SCA garb in context" and "figuring out what the history should have been in these Paradox Interactive games" (the actual game going...ahistoric very quickly, but the mechanics are based on Real Stuff) rather than anything in my formal education.

Am also quietly pondering how much that framework of "missing era" applies to the stuff I am trained in (EE/CS). And there's probably history soup tied in there as well, but also fields of specialization? I know very little about Large Scale Power, to take a nontrivial example.