Originally Posted by gran_guitarra
So how is it decided which regionals are used by which factions? For example, why do the Seleukids/Makedonians use Galatian Heavy Spearmen, whereas the Ptolemaioi use a Legionary knockoff?
Which factors decide the Regionals available to a faction? I imagine that expansion during the time period, the faction's military thinking and style, and its culture would come into play, but is there anything else? Since if we use only that then the Romans should have access to all of the Regionals south of the Danuve and west of the Rhine, but that ain't so.
btw, why are the Balearic Light Infantry only available to the Carthaginians if they sold themselves as mercenaries to the highest bidder? I can understand why the Romans don't have them (Velites are practically the same thing), but why do the Gauls/Lusotannan not have them?