The Battle of Holmengrå (Norwegian: Slaget ved Holmengrå) was a naval battle fought on 12 November 1139 near the island Holmengrå south of Hvaler, between the forces of the child kings Sigurd Haraldsson and Inge Haraldsson on the one side, and on the other side the pretender Sigurd Slembe and his ally King Magnus the Blind (by Sigurd's claim his nephew). Inge and Sigurd Haraldsson were sons of the previous king Harald Gille, who had been killed by Sigurd Slembe in 1136. The sons of Harald Gille emerged victorious from the battle. Magnus the Blind was killed in action, while Sigurd Slembe was betrayed, captured, and later tortured and executed. Background After Sigurd Slembe reportedly was told by his mother that he was a son of King Magnus Barefoot, he travelled to Scotland where he gained military experience, and went on a pilgrimage to the Holy Land. Sigurd returned to Norway in 1136 and arranged a meeting with King Harald Gille, requesting to be recognised as his brother (Harald had also claimed to be a son of Magnus Barefoot), but instead found himself accused of a murder in Orkney and outlawed by Harald. Sigurd managed to escape, and after some time in hiding, he and some supporters assassinated Harald in Bergen. While Sigurd took responsibility for the murder, the people responded that they did not want a man who murdered his brother for a king, or alternatively, if he was not Harald's brother, that he had no right to the throne. After Harald's death, his queen Ingrid Ragnvaldsdotter and the chieftains quickly arranged to have Harald's sons, still children, proclaimed as kings. Sigurd Haraldsson was proclaimed king at the Øyrating in Trøndelag, while Inge Haraldsson was proclaimed king at the Borgarting in the south-east. Since they had been brought up in different parts of the country, both were proclaimed kings by their respective supporters, but the two factions soon joined forces in light of the threat from Sigurd Slembe. Sigurd Slembe was again outlawed, and in an attempt to increase his support he allied himself with Magnus the Blind, who had been deposed by Harald Gille in 1135, and had him reinstated as king. When he was deposed, Magnus was blinded, castrated, and had one of his feet cut off, after which he had been placed in a monastery. Following his release by Sigurd, he managed to raise an army