Thats why we should have focused on north, subdue the sudani coast and seize somr of yemen.Aside from thick jungle forests It also has tetsy fly, like it's really a bad drawback. Not only is it bad for draft animals(work animals) like cows/cattles, donkeys, camels or horses, but also agriculture as a result.
I mean why would Somalis expand into into the fertile plains of Awash, the shabelle zones, mountains/highlands and Juba-tana. But not go further south ? The answer is pretty obvious when you look at this.