In Sweden, however, both the Vestgotar and the Upland Sviar were discontented, the former on account of the breaking of the king's promise to Olaf of Norway and the latter on account of the introduction of the new religion, and their passions were further inflamed by the lawman Anund of Skara.
A rising in Upland compelled Olaf to share his power with his son Jacob, whose name was changed to Anund by the leaders of the revolt.
Anund, now sole king, early in his reign allied himself with Olaf Haraldsson against Canute of Denmark, who had demanded the restitution of the rights possessed by his father King Anund, Sweyn in Norway.
His return an indecisive battle was fought at Helgi A, and Anund returned to Sweden.
We hear from Adam of Bremen that Anund was young in years but old in wisdom and cunning; he was called Kolbrannea because he had the houses of evildoers burnt.
The coins of Anund surpass all that were struck during the next two centuries.