Jutland peninsula is made up of the German Bundesland of Schleswig-Holstein. Schleswig-Holstein has two parts: the former duchies of Schleswig (Danish fief) and Holstein (German fief), both of which have passed back and forth between Danish and German rulers several times. The last adjustment of the Danish–German border followed the Schleswig Plebiscites in 1920 and resulted in Denmark's regaining Northern Schleswig ( or more commonly today: "Sønderjylland"). The historical southern border of Jutland are areas south of Kiel, Husum and Rendsburg, but the river Eider was the border between the former duchies of Schleswig and Holstein, as well as the historical
Jutland Jutland in the North Sea west of Jutland was one of the largest naval battles in history. In this pitched battle, the British Royal Navy engaged the Imperial German Navy, leading to heavy casualties and losses of ships on both sides. The British fleet sustained greater losses, but remained in control of the North Sea, so in strategic terms, most historians regard Jutland either as a British victory or as indecisive. The distinctive Jutish (or Jutlandic) dialects differ substantially from standard Danish, especially West Jutlandic and South Jutlandic. Dialect usage, although in decline, is better preserved in Jutland than in