Factions (so far):
Kingdom of Riva
Kingdom of Cherek
Kingdom of Drasnia
Kingdom of Algaria
Kingdom of Sendaria
Kingdom of Arendia
Kingdom of Gar go Nadrak
Kingdom of Cthol Murgos
Kingdom of Mishrak ac Thull
Troop tree basis:
Drasnia- Main unit is the pikeman, has very fast overland speed and wield huge pikes, line similar to rhodoks. No cavalry, and for ranged support I think they'll be similar to the nord huntsmen and archers.
Cherek- Pretty much just nord tree. They use a skin that is 10% larger so they have slightly better reach and deal slightly more damage.
Riva- Similar to nords, but they use bastard sword and shortsword instead of axes and arming swords.
Algaria- Similar to khergit tree
Sendaria- similar tree to Swadia, their top tier units aren't that great but their low and middle troops are pretty decent. Peasant army basically.
Arendia- similar to Swadia too, though their knights will be stronger and I might include an asturian archer branch to the tree.
Tolnedra- Not sure, but similar to rhodoks. Main unit is legionaire though, and they use a smaller skin than others.
Gar og Nadrak- similar to vaegir
Cthol Murgos- pretty much similar to Sarranid, but all troops above recruit will have at least a mail byrnie- so they'll be pretty strong.
Mishrak ac Thull- Similar to Vaegir, but they also have a man catcher branch. Man catchers are fast cavalry equiped with blunt weapons, they'll also have high athletics so even when dismounted they're fast. Also, the Thulls use the big skin the same as the chereks.
Mallorean Empire- Not sure