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.
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