I'm filling out Khumer's sheet bit by bit. Trying to make it as exceedingly unpleasant as possible and fill the token brutal realm slot and sorcerer-kingdom cliche quite fully. That in mind, with myself ideally situated along that southwestern mountain-spine and the hills & flats east of it- rather than the western delta on the map-in-progress, which Cap'n wants to take, although he's presently sorting out his sheet- I should probably sort out some vagueries about how Khumer's interacted with the states of Jukku, Arman-Arhus, and Vathcras. Plus, going a bit further back, and even now with far-ranging slaver parties, Fulmen and Azraca-Terus. Among the ideas I bounced around with Cap'n was that the western delta was another Khum successor in personal union with Khumer that screwed the pooch on maintaining control, falling to slave rebellion and internal conquest from the previously subjugated Bedouin-alike tribes. Considering the somewhat migratory nature of ethnostates in the theme and time period, I can't say if the states and peoples on what I've tentatively thought as the old heartland of old Khum- particularly Jukku and that inland sea- are the same peoples who threw the Empire out, along with the neanderthal quasi-men that forged it, but either way there is undoubtedly bad blood and recent warring with Khumer regardless.