So, following defeat in the German-Danish war, Christian IX went behind the backs of the Danish government to contact the Prussians, offering that the whole of Denmark could join the German confederation, if Denmark could stay united with Schleswig and Holstein. This proposal was rejected by Bismarck, who feared that the ethnic strife in Schleswig between Danes and Germans would then stay unresolved. Christian IX's negotiations were not publicly known.
What if, Bismarck finds a compromise and annexes Denmark into the German confederation?
Can he manage to force it into the North German confederation and into the Reich too?