As the resident history nut around here, here's my take.
If you want a purely history oriented forum, try these guys, they discuss a lot of that stuff:
https://historum.com/history-forums/
If you want to discuss the sources of various claims, well, given this is historical datum on our history pages and we discuss these historical topics as they are often mined for use in fiction, then insofar as your inquiry in that regard makes our pages better, ask away. If you want to discuss these topics solely on historical grounds only, try that forum I linked.
I hope that answers your questions. If you want to discuss these matters with a fellow history scholar at further length off-forum, let me know via my email (see our contact page to find it) and ask me for either Steam or Discord, whichever you find more comfortable, and I'll be happy to accommodate you.