We have 6 Warband factions: Swadia, Rhodock, Nords, Vaegirs, Khanate, Sultanate.
And 6 ( or 8 ) Bannerlod factions: Vlandia, Battania, Sturgia, Calradic Empire (Senate, Queen, Military), Khuzait, Aserai.
Some continutiy is pretty clear:
Vlandia is Swadia + Rhodock since Rhodock are Swadians...