As in the title, how do we get the Afroasiatic populations in the Horn of Africa to replicate want Bantu people did and take over Africa south Cameroon? This includes all Afroasiatic people in the region, be they Semitic, Omotic or Cushitic, but not Chadic(they are not in the Horn anyway), if you want to be creative the South Semites in Arabia could also play a role(in Madagascar?)
Earliest POD should be the bronze age collapse, but if you find it too limiting feel free to suggest something earlier, but not pre-bronze age!
Earliest POD should be the bronze age collapse, but if you find it too limiting feel free to suggest something earlier, but not pre-bronze age!