Schleswig
Schleswig, or South Jutland, was a Danish duchy on the Jutland peninsula. In 1337 Valdemar V of Abel's line ruled it as a Danish fief, having abdicated the Danish throne in 1329.
After Abel's line ended in 1375, Schleswig passed in 1386 to the counts of Holstein-Rendsburg. At Ribe in 1460 the estates chose Christian I to rule Schleswig and Holstein together. Later partitions divided the duchy between the Danish crown and the Gottorp dukes, whose share Denmark absorbed after the Great Northern War.