counted on the forces of Norway to relieve the pressures on Danish provinces in Scania by attacking Sweden along the Norwegian–Swedish border. Norway Norway, governed by Christian's son-in-law, Governor-General Hannibal Sehested, was a reluctant participant. The Norwegian populace opposed an attack on Sweden, which would only leave them open to counter-attack. Their opposition to Statholder Sehested's direction grew bitter and the war was lampooned as the "Hannibal War." The Danes cared little for Norwegian public sentiment when Denmark was threatened and Jacob Ulfeld initiated an attack into Sweden from Norwegian Jemtland. He was driven back and Swedish troops temporarily occupied Jemtland and advanced into the Norwegian Østerdal before being driven back. Sehested had made preparations to advance with his own army and a similar army under Henrik Bjelke into Swedish Värmland but was ordered to relieve the King in the Danish attack on Gothenburg. When Sehested arrived the King joined his fleet and performed heroically, even though wounded, preventing Torstensson's army from moving onto the Danish islands. On the Norwegian front, Sehested attacked and destroyed the new Swedish city of Vänersborg. He also sent Norwegian troops under the command of George von Reichwein across the border from Vinger and Eidskog and troops under Henrik Bjelke into Swedish Dalsland. Aftermath Christian's Danish forces were so exhausted that he was forced to accept the mediation of France and the United Provinces in suing for peace. The Peace of Brömsebro was signed on 13 August 1645, a humiliating disaster to Denmark–Norway. The Swedes were exempted from the Sound Dues, the toll for passing through Danish territory into the Baltic Sea. Denmark–Norway ceded to Sweden the Norwegian provinces of Jemtland, Herjedalen and Idre & Serna and the strategically valuable Danish islands of Gotland (Valdemar Atterdag of Denmark had conquered the island from Sweden in 1361) in the center of the Baltic and Øsel in the Baltic Sea. In Dalarna the landshövding (chief of the land i.e. governor) raised a host of 200 dalecarlian farmers who seized the region of Särna, making it de facto Swedish territory. Sweden occupied the Danish province of Halland as well as other territories for 30 years as a guarantee of the treaty. The heir to the thrones of Denmark-Norway, Frederick II, Administrator of the Prince-Bishopric of Verden (1634–1645) and of the Prince-Archbishopric of Bremen (1635–1645), had to resign, with the two prince-bishoprics being occupied by the Swedes. According to