The next spring, after a short stay in Viken, Sverre and the Birkebeiners returned to Trøndelag. The Birkebeiners now shifted to a more confrontational strategy. However, an attack on Nidaros ended in defeat at the Battle of Hatthammeren ("Slaget på Hatthammeren"). After fleeing south, they met Magnus' army in Ringerike, with the skirmish ending in a tactical victory for the Birkebeiners. Encouraged, the Birkebeiners returned to Trøndelag and managed to subdue the region enough to stay in Nidaros during the winter.