Karl Albrecht
Charles Stephen was an officer "à la suite" of the Imperial German Navy and proprietary head of the 8th Austrian Infantry Regiment. His brother, Feldmarschall Archduke Friedrich, was commander-in-chief of the Austro-Hungarian Army from July 1914 to February 1917, and his eldest son, Archduke Karl Albrecht, held the rank of "Oberst" (colonel) at the end of World War I.