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 horse Felding's Kamp med Risen"", in which mythic hero Svend Fælling goes on a pilgrimage to Rome and on his journey encounters a giant. Other horses prove too shy or too weak to enable him to confront the giant, so Svend obtains a Jutland horse from a passing miller, who claims that it is strong enough to carry 15 skippund. Mounted on the Jutland, Svend succeeds in killing the giant. The Frederiksborg horse, another Danish breed, influenced the Jutland during the 18th century. The Frederiksborg had a significant amount of Spanish influence, and was used to give the Jutland more active