To the north, the strait of the Baltic Sea known as the Little Belt (Danish: Lillebælt) ran alongside the ethnically mixed Danish Duchy of Schleswig, part of an area subject to a highly complex dispute, known as the Schleswig-Holstein Question, between Denmark and its neighbors. After the Second Schleswig War in 1864, the Danish-German border ran through the strait until 1920, but ultimately, the Schleswig Plebiscite moved the border to its current location, south of the Little Belt. ...