The Barbarian Kingdoms.

On the edges of the Adronus Galaxy there are small barbarian kingdoms, ruled over by men or other sentient species.  One of the more powerful of these is the Asduun Kingdom, who's main populous is zionites.  The Asduun Kingdom is the descendant of the Xaccjal Tribe, a mix of zionites and quelnhen, (more information on quelnhens in Adronus Encyclopedia) where one of the barbarian nations that toppled the Zion Empire.  Along with these kingdoms, there are entire alien species, who are hardly sentient, that live on savage planets, and they themselves are monstrous beings, like those in video games.  The barbarian and savage kingdoms are a fairly constant threat to the major nations in the Adronus Galaxy, though the Incon Planetdoms sometimes make peace, and the Tua Republic tries to help the barbarians.