After the German unification of 1871, a united Imperial Navy was established as successor of the Prussian Navy and the North German Federal Navy, from 1 January 1872 under the authority of the German Imperial Admiralty (Kaiserliche Admiralität) led by Minister of State Albrecht von Stosch. With the accession of Emperor Wilhelm II in 1888, the naval forces strongly gained in importance. Soon after, the command structure was reorganized with the establishment of the Imperial Naval Cabinet, the German Imperial Naval High Command (Kaiserliches Oberkommando der Marine) and the Naval Office, from 1897 under State Secretary Alfred von Tirpitz.