When the Woden Ric is sunk, you wash up near Doccinga and will meet with Thonkrik, the village elder.
Once he sends you on the quest to Kennemer, the Jarl quests begin. Once on To Kill a King you have a choice, help the Jarl and kill the Konungr, or rush to the coast and help Doccinga defend against Sven Bull-Neck.
Even though Friese is a puppet state of the Kingdom of Danmark, they still go to war against Northhymbre, another puppet state.
Most of the Frisians are Christians, although their rulers are mostly pagan. There is a monastery named Willibrod in the north of Friese.
History[]
Prior to the game's events, Friese was a Frankish territory. The Danes later freed the disgruntled Frisians, but gave the monarchy to a Danish puppet king, Hrorek Hemmingsson. This once again sparked the rebellious fury in the Frisians.
Wikipedia has an article on this subject at: Frisian Kingdom