Hmmm the most definitive post I can find on it was posted by Aeon....I could very well have been led astray, my brains may have made a connection that wasn't there...
In my defense here is what Aeon posted a LONG time ago..
It might be a bit of a pointless diversion, but let's speculate on the characteristics of factions based purely on their names (which is pretty much all we have right now). It might throw up some good ideas/stimulate some detail leakage from the developers. You could also contribute smaller faction ideas you have, or things you would like to see. If you have a full blown faction idea it probably belongs in this thread.
Kingdoms of Men:
Kingdom of Altar
Kingdom of Yoren
Kingdom of Gildren
Kingdom of Tarth
Kingdom of Capitar
Kingdom of Ithul
Empires of the Fallen:
Empire of Uthugul
Empire of Calax
Empire of Turzog
Empire of Izen
Empire of Dol-Sirion
Empire of Korin
Now as far as I can see the only mention of any of these names elsewhere is that Calax is a Dread Knight, last seen falling off a balcony. Now apart from the fact that the Empire of Calax are going to be slightly bitter about the whole balcony thing (irrespective of whether Calax survived or not), I'm speculating that they are a highly militaristic empire made up of hosts of unswervingly obedient grunts. Their magic is of the sort that gives their troops a distinct military advantage, allows them to produce larger numbers of troops quickly and instills fear in the opposition.