Christian IX signs the so-called
November Constitution establishing a shared law of succession and a common parliament for both Schleswig and Denmark. This is seen by the
German Confederation as a violation of the 1852
London Protocol.
24 December –
Saxon and
Hanoverian troops marched into Holstein on behalf of the Confederation. Supported by the German soldiers and by loyal Holsteiners,
Frederick VIII, Duke of Schleswig-Holstein took control of the government of Holstein.