i loaded up the world map, saw that the two largest human cities were right next to each other and in the same empire, and went there with my one surviving spearmaster.
did a few quests, and once they were "loyal" (i've noticed that human leaders will sometimes join you before they are loyal, or even before you have done any quests with them at all) I joined up with the local master archer and called it a day. Two human leaders, one dwarf, and a random hammerman will have to be good enough for the experiment.
I started up a human adventurer as a member of that civ, and asked for the capitol. they told me where it was, and that blahblah the Spearmaster was there! not the original master archer, but the forign spearmaster that i brought! so I went there, and asked someone else. they mentioned that the master archer was there.
indeed, all four of the characters (two human leaders, one dwarf, one random hammerman) were hanging out. only the original leader would give quests, the rest said either that they wouldnt bother or "ask me when i get home".
I started up other human adventurers (yes, my map is such that a noob adventurer cant safely walk from one human empire to the next) and checked out both the capitol where i the leader joined me and died, and also the one where the leader joined me and retired elsewhere. in each case, the citizens of the civilization directed me to the capitol but did not mention anyone being there.
and indeed no one was.
so ive cranked up a fort and i guess im going to skip all the crafting / trading / artisan stuff and just start pumping out a military. its nearest the empire where i retired, but its still the first year so i have not make contact with the humans yet. i'll keep you posted.