Norway, whose defences had been sadly neglected, suffered greatly, during this war, from Swedish incursions. A Swedish army of 4,000 men, under the command of the Frenchman, Claude Collart, conquered Jemteland and Herjedalen and crossed the mountains to Throndhjem. The fortress Stenviksholm was forced to surrender, and the people of Throndhjem and the surrounding districts submitted without resistance and paid homage to the Swedish king. Later, however, Claude Collart was defeated by a fleet sent against him by the governor at Bergenhus, the rich and highly-esteemed Erik Rosenkrands. Claude Collart took refuge in the fortress Stenviksholm; but here he was besieged, and was finally obliged to surrender. He was sent in irons to Copenhagen. Especially hard for the Norwegians was the year 1567, when the Swedes harried Hedemarken, Romerike and Soloer, and captured Hamar. The cathedral of Hamar was burned, and the Swedes marched against Akershus, which was bravely defended by the commander, Kristen Munk. The citizens of Oslo burned their town in order to prevent the Swedes from obtaining a foothold there. On this occasion the Swedes lay encamped on the mountain side above the town, on a plain afterward called the "Swedish plain." The Norwegians were hard pressed; but Erik Rosenkrands again sent assistance from Bergen, and the Swedes were obliged to leave the country with considerable loss. The incursions of the Swedes were, however, repeated from time to time, and, during one of them, the town of Sarpsborg was burned, January, 1570. Finally, in December, 1570, peace was concluded at Stettin, and the terms were, on the whole, favorable to Denmark. In return for relinquishing her claims to Sweden, which could never have been established, she secured an acknowledgment of her rights to Norway, Scania, Halland and Blekinge, while Sweden returned the Norwegian provinces of Herjedalen and Jemteland, and paid 150,000 Rigsdalers for war expenses. Both countries retained the right to carry the "three crowns" in their coats-of-arms.