Diplomatic efforts, including a personal offer by Christian IX that his whole Kingdom would join the German Confederation if it could remain united with Holstein and Schleswig, failed. Two year later Prussian forces expelled the Austrians from the region altogether and South Jutland was annexed into the German Empire.
The text describes diplomatic efforts that ultimately failed to achieve unification of the German Confederation.  Two years later, Prussia took control of South Jutland by force, adding it to the German Empire.