Olaf Haraldsson was made king of Vingulmark by his father and then later inherited Vestfold after his brother Bjørn Farmann had been killed by their half-brother Eric Blodøks.
V roce 1157 byl zabit i Haakonův strýc Øystein a Haakon se stal jeho dědicem. Příznivci Sigurda a Øysteina se však spojili pod Sigurdovým synem a obnovili boj proti Ingemu. 3. února 1161 vedl Inge své muže do boje proti Haakonovi poblíž Osla…