The Military Cabinet (Militärkabinett) was a military advisory body under the direct command of the King of Prussia, and by extension the German Emperor after 1871, for handling personnel matters of the army officer corps. It emerged from the Prussian Army personnel department in the wake of the 1809 reform of the military, and was officially established 3 June 1814. It developed under Emperor Wilhelm II into a personal instrument of the monarch for processing all military matters.