Haakon, a younger son of Harald Fairhair, was fostered as a Christian at the court of King Athelstan of England. Returning about 934, he displaced his half-brother Eric Bloodaxe and ruled Norway until 961. He is credited with organising the regional law assemblies and the leidang coastal levy. His attempts to introduce Christianity met resistance and he compromised with pagan custom. Mortally wounded defeating Eric's sons at Fitjar, he was buried in a mound and praised in the pagan poem Hákonarmál.