Ialu's village is on a fairly large river and not that far from the sea, so it's looking like he'd have to be in the north. Perhaps Garakai has one half of the north and the Strong Tribe has another, @Rtron?
I mentioned when the village was first settled that it was a grassland separated from most other human lands by a large forest that encompassed it, which was at that time crawling with Cimex and Dyun. So I'd assume that it makes more sense for Ialu to have the western side of the north, but at the same time there's no river there. Shall we just say that his river is somewhere over there but not as large as the others that are actually marked on the map?
I think it'd be better if the Strong Tribe was at or near the first 'A' in Alma Toren Fort. Viscardi would have mobilized the slaves, dragons, and normal forces he had to attack the Strong Tribe. It would not have been pretty.