King Harald sailed north to Viken with all the conquered ships after the battle of Nis River, and spent the winter at Oslo. Earl Haakon went to the Uplands and remained in his dominions there during the winter. In the spring, however, he gathered all his loose property and fled eastward; for he heard that King Harald had again become his enemy, mainly because Haakon had allowed King Svein to escape after the battle of Nis River. Haakon proceeded to King Steinkel of Sweden, who gave him the province of Vermeland to govern. When Haakon heard that King Harald had gone north to Throndhjem, he made a hurried expedition back to the Uplands and collected the taxes due him. The next summer King Harald in vain tried to collect taxes in the same places. Then King Harald gathered an army, with which he invaded Sweden, and defeated Haakon. Upon his return he severely punished the people of the Uplands for having been disloyal. He maimed some, killed others, and robbed many of all their property. Year after year King Harald had made war on Denmark without coming nearer to King Svein's throne. It appears that finally the people in both counties became tired of this continual and wasteful warfare, and during the same winter that Earl Haakon had settled down in Vermeland, Sweden, there were many negotiations between leading men of both countries who wanted peace and demanded that their kings should come to an agreement. The result was a meeting of the two kings at the Gaut River, where peace was agreed upon. Harald was to have Norway, and Svein Denmark; the war should cease as it now stood, each retaining what he had got, and this peace should endure as long as they were kings. This peace was confirmed by oath, and the kings parted, having given each other hostages (1064).