The Duchy of Schleswig was a historical region located in what is now northern Germany and southern Denmark. It was part of the larger Duchies of Schleswig and Holstein and was ruled by various Danish and German monarchs over the centuries. The duchy played a significant role in the conflicts between Denmark and Germany in the 19th century, particularly during the Second Schleswig War in 1864. In 1864, the Duchy of Schleswig was annexed by Prussia and Austria after their victory over Denmark. Following the war, the region was administered by Prussia and later became part of the German Empire in 1871. The duchy's status and borders have influenced the cultural and political landscape of northern Europe, contributing to ongoing discussions about national identity in the region.