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 genetic diversity of the three Danish breeds was found to be similar to other European breeds. As of 2011, one Danish breed conservation organization estimates that about 1,000 Jutlands remained. Although originally bred for use on farms, few members of the breed are used for agricultural purposes today, and are now mostly bred for horse shows and working in urban areas. However, the Carlsberg brewery has used the Jutland to pull its drays since 1928. The brewery owned 210 Jutlands at their peak, and today still uses about 20 for transporting beer around Copenhagen. The Carlsberg horses also compete and