Jack, those locations are where the project is being worked on, doesn't mean there's any historical connection between them. A digital sculptor could live in N.C. or Utah, for example.
However, I think Jim is being quite sneaky here. If "on-the-ground" research IS being done in some of those locations, the two eastern states would suggest ACW or AWI, while the two western states would suggest Indian or Range Wars.
But then again, why not both at once? It is quite possible the project could involve crossover. I could imagine a Cavalry kit, for example, that included options to construct troopers from 1861 through to about 1873, further if they were clever with their equipment sprues. Uniforms did not change radically over that time period, and nor did weapons (A trapdoor Springfield does not really look any different to the rifle musket it was converted from in 28mm or smaller. Unless loading poses are included). Maybe we are looking at something that big? Plus, there were ACW battles *in* the west, and native American involvement during the ACW era.
You could probably manage to represent various tribes with head swaps and add-on costume pieces, too. The Perry Madhist kit is a good example of how to do this, but basic warrior sprues (with heads/hats) plus full sized equipment sprue (with weapons) could do it even better.
So... infantry, mounted cavalry, dismounted cavalry, artillery, mounted braves, dismounted braves, with hats and other accessories to allow for most combatants over 1861-76 (just to get Custer into the picture). Zouaves get left out, or left for later. You know where to get them if you need them :)
Sale of these equipment sprues as separate items would also be a canny move. Warlord is doing very well by making their Bolt Action weapon sprues available.
Oh, and if this *does* turn out to be the case (or close to it), I promise to buy enough boxes to do F Troop and the Hekawi.