[1] In the following years, Canute tried in vain to defeat Sweyn III on Zealand for complete control over Denmark.

The resulting compromise of 1152, which was supported by Valdemar, made Canute the inferior co-regent of Sweyn.

Sweyn fled Denmark in 1154, and Canute struck a deal with Valdemar, making him his co-ruler.

Canute was an inferior king to Valdemar,[3] and after Sweyn's re-entry into Denmark, a final compromise was struck in 1157, under pressure from the Danish magnates.

[3] Canute's half-sister Sofia of Minsk married Valdemar, who avenged him the same year by killing Sweyn at the Battle of Grathe Heath to win Denmark for himself.