- This article is about the region of Schleswig on the German/Danish border. There is also Schleswig, Iowa in the United States of America.
Schleswig was together with Holstein the cause for several disputes between Germany and Denmark in the 19th century. The Duchy of Schleswig was a fief under the Danish Crown until 1864, from 1460 in personal union with Denmark. From 1864 Schleswig-Holstein was part of Prussia until a referendum in 1920 resulted in Northern Schleswig joining Denmark, whereas Southern Schleswig voted for staying to be a part of Germany.