King Christian, who had in vain expected support from the emperor, found himself defeated on every point, and had no other choice than to make peace. The treaty was signed August 13, 1645, at Brœmsebro, Denmark ceding the provinces of Jemtland and Herjedal and the islands of Gothland and Œsel. The province of Halland was to remain for thirty years in the possession of Sweden, which country was exempt from duties of toll for the traffic in the Sound. Denmark disavowed all claims of supremacy over Holstein, the duke of said country two years later formally placing himself under Swedish protection.
Lennart Torstensson had fulfilled his task in Denmark and returned to Germany. At Jueterbogk, in Brandenburg, he met the imperial army, which had been sent to cut off his retreat from Denmark, and entirely routed it. After this victory Torstensson hastened to Bohemia, resolved to “attack the emperor in his heart and force him to make peace.” At Jankowitz, in Bohemia, Torstensson administered a new and crushing defeat to the imperialists, in 1645. The emperor, who himself had ordered his army to battle, had arrived in Prague to witness the defeat of the Swedes, which the Holy Virgin had promised him in a dream. He soon learned the news, which was quite different from that expected. The imperial commander-general, five generals and eight colonels were made prisoners by the Swedes, who captured the artillery and baggage of the enemy. The health of Torstensson was at that moment so good that he was able to lead the movements on horseback. He said that such a bloody battle would not be seen for a long time.
Torstensson invaded Moravia, the fortresses surrendering and the inhabitants fleeing in terror. For a second time he stood at the walls of Vienna. The very fortifications which protected the bridge across the Danube were captured by the Swedes. The enemy, whom the elector of Saxony had promised to chase out of Germany, was now knocking at the gate of the emperor, who heard the report with consternation. But Lennart Torstensson was forced to surrender to a perfidious enemy, who came to his door without knocking. His rheumatic ailment returned with such violence that he was obliged to renounce his command and return from the fields where he had led none but victorious armies. He was succeeded by Charles Gustavus Wrangel. The latter had to give up the siege of Vienna, but maintained, in connection with the French, the supremacy in Germany until an honorable peace was won. Upon his return to Sweden, Lennart Torstensson was covered with distinctions, being made a baron and a count on one and the same day. He was appointed governor-general of West Gothland, Vermland, and the lately conquered Halland, with his seat at Gothenburg, where he built himself a palace (still the official residence of the governor of Gothenburg and Bohuslæn). Lennart Torstensson died in 1651, leaving behind the fame of one of the greatest warriors known to history, and a spotless memory.