and wished to integrate the ethnically mixed Schleswig as well as the all-German Holstein, which until 1806 had been part of the Holy Roman Empire and then was part of the German Confederation, into a new German Empire. Danes refused to abandon Schleswig and sought to integrate the duchy into the Danish kingdom. The status of Holstein as part of the confederacy, on the other hand, was not questioned. This dispute culminated in two wars, the First War of Schleswig in 1848–1851 and the Second War of Schleswig in 1864. See also History of Schleswig-Holstein List of treaties Schleswig-Holstein Question References Further reading Sir Andrew Halliday Annals of the House of Hannover, v.2, London, 1826. Ribe 15th century in Denmark 1460s treaties 1460s in the Holy Roman Empire 1460 in Europe History of Schleswig-Holstein