You’ll also find them around and about in any sort of historical sub

Most of the tankies I’ve encountered have been in the comments of historymemes communities on posts about the fall of the Berlin Wall. Go in expecting Regan jokes, come out after having a 30 comment argument with someone trying to claim that the Holodomor didn’t happen (like, at all, not that it wasn’t intentional), that Stalin never condoned the Purges, and the Stasi weren’t that bad