As the ally of the Elector of Brandenburg, but principally in the hope of recovering the lost provinces, King Christian, against the advice of Griffenfeld, commenced war against the Swedish king, Charles XI. This war, which lasted from 1675 to 1679, was called the Scania War, because that province was the principal scene of action. The Danes captured Wismar and some places in Scania, but lost the battles of Halmstad, Lund, and Landskrona. At sea, however, the Danes were generally successful. Admiral Kort Adeler had put the navy in good condition and had a worthy successor in the naval hero, Niels Juel, who won victories at Oeland and Kolbergerheide, and especially in the great naval battle of Kjögebugt (October 4, 1677). As Griffenfeld had foreseen, however, the Danes could accomplish little against the allies of France, and Christian was obliged to accede to peace proposed by Louis XIV. The peace was concluded at Lund (1679), and all that Christian V. obtained, for his efforts during an expensive four years' war, was permission to take with him ten cannons from each of the conquered fortresses. During this war, which the Norwegians called the Gyldenlöve Feud, after their leader, the brave Ulrik Frederick Gyldenlöve, the Norwegians several times defeated the Swedes. In February, 1676, Gyldenlöve marched into Bahus Len with 11,000 men, conquering Udevalla and Wenersborg. The following year he took the fortified town of Marstrand by storm and compelled the fortress of Carlsten to surrender. In order to prevent the Norwegians from making further progress, the Swedish chancellor, Magnus de la Gardie, hastened into Bahus Len with 8,000 men, but was defeated by a much smaller Norwegian army, under Major-General Hans Lövenhjelm, at Udevalla, August 28, 1677. About 1,500 Swedes were slain and two hundred were captured, together with fourteen pieces of artillery and all the supplies. The following year the ever-active Gyldenlöve attacked Bahus Castle, which, however, he was unable to capture, as it was defended with great heroism and perseverance. The war ended, on the part of Norway, with an incursion by Gyldenlöve into Sweden in 1679, in order to avenge a similar expedition which the Swedish General Sparre had made into the region of Throndhjem the previous year, on which occasion the copper works at Röros had been burned. The Norwegian code of laws, which is yet partly in force, was elaborated by direction of Christian V., dated April 15, 1687, and published April 14, 1688. He abolished Latin singing in the churches, introduced a new church ritual and a Danish hymn-book.