 The chronicle says that the crusade took place between the Battle of Sparrsätra in 1247 and the death of King Eric (XI) in 1250, and presents the Tavastians ("taffwesta") as the Swedish opponents.According to the chronicle, the expedition was prepared in Sweden and then conducted over sea to a land on the coast, where the enemy was waiting.The Chronicle also mentioned that a castle called "taffwesta borg" was established after the war.