Prince Frederick Christian Charles Augustus of Schleswig-Holstein KG GCVO KStJ PC ADC (22 January 1831 – 28 October 1917) was a minor Danish-born German prince who became a member of the British royal family through his marriage to Princess Helena of the United Kingdom, the fifth child and third daughter of Queen Victoria and Prince Albert of Saxe-Coburg-Gotha
Despite the growing power of Roman Catholics in North Germany, and the threat to the Danish holdings in the Schleswig-Holstein duchies, Christian for a time stayed his hand. The urgent solicitations of other powers, and his fear that Gustavus Adolphus should supplant him as the champion of the Protestant cause, finally led him to enter the war on 9 May 1625. 
Christian August von Augustenburg hatte bereits 1837 anonym eine Schrift mit dem Titel Die Erbfolge in Schleswig-Holstein veröffentlicht, in der er die Geltung des Holsteiner Erbrechts für ganz Schleswig-Holstein und damit seine eigenen Ansprüche mit dem Vertrag von Ripen (Up ewig ungedeelt) begründete.
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Princess Helena of the United Kingdom VA CI GBE RRC (Helena Augusta Victoria; 25 May 1846 – 9 June 1923), later Princess Christian of Schleswig-Holstein, was the third daughter and fifth child of Queen Victoria and Prince Albert. Helena was educated by private tutors chosen by her father and his close friend and adviser, Baron Stockmar.
Palmerston's speech led to exaggerated hopes in Denmark of British intervention should the Schleswig-Holstein question come to war. However, the small size of the British Army limited the United Kingdom's ability to intervene in Schleswig-Holstein together with the continual tensions with the United States required that Britain act in co-junction with another major European power such as ...
So the revenues of the duchies, deriving from the rights of overlordship in the various towns and territories of Schleswig and Holstein, were divided in three equal shares by assigning the revenues of particular areas and landed estates, themselves remaining undivided, to each of the elder brothers, while other general revenues, such as taxes from towns and customs dues, were levied together ...