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 from the time show Viking raiders in what is now Great Britain riding horses similar in appearance to the modern Jutland. Some of those horses may have been left behind, contributing to the base stock from which the Suffolk Punch was eventually developed. Horses from Jutland were exported to England, Germany, and France during the Middle Ages, and were popular mounts for knights, especially for use in jousting. The first mention of the Jutland type is from the 12th century, when they are documented as war horses with many useful attributes. The Jutland horse appears in the Danish ballad ""Svend