 Complete the following phrase:  In 186364, disputes between Prussia and Denmark over Schleswig escalated, which was not part of the German Confederation, and which Danish nationalists wanted to incorporate into the Danish kingdom. The conflict led to the Second War of Schleswig in 1864. Prussia, joined by Austria, easily defeated Denmark and occupied Jutland. The Danes were forced to cede both the Duchy of Schleswig and the Duchy of Holstein to Austria and Prussia. The subsequent management of the two duchies led to tensions between Austria and Prussia. Austria wanted the duchies to become an independent entity within the German Confederation, while Prussia intended to annex them. The disagreement served as a pretext for the Seven Weeks War between Austria and Prussia, that broke out in June 1866. In July, the two armies clashed at Sadowa-Königgrätz Bohemia in an 