Fortune-seekers came from the coast, from the steppes, and most of all from the Nordlands. Tribal elders made alliances with the newcomers, sealed by wedding vows, and with their share of the trading profits hired mercenaries to subdue other tribes. Sturgia became a collection of principalities, then a kingdom, the great powerhouse of the north.
...
Now, the Nords were a favourite faction in Warband, and we know a lot of people are drawn to Vikings - the blood eagles, the shipboard funeral pyres, the berserkers eager to join the feasting at Valhalla. Sturgia is Nordic-influenced but it's not really a Viking state: the Nordlands are off of the map (for the present, anyway) and they wouldn't really form the kind of proto-feudal kingdom that the Bannerlord factions represent. But, if players want to have a west Scandinavian-style play experience, the raiding, the companions, the ring-swords, two-handed axes, Valsgarde helmets, hauberks and raven banners will all be there. Among the Sturgian minor factions are the Skolderbroda, a mercenary brotherhood based on the (possibly legendary) Jomsvikings of the Baltic. The Finnic tribes meanwhile are represented by the Sons of the Forest, a semi- nomadic clan that practices swidden slash-and-burn agriculture in the depths of the woods.