sentences:  His younger sister was Fanny zu Reventlow (1871-1918), the "Bohemian Countess" of Schwabing.Reventlow embarked upon a career in the German Imperial Navy, reaching the rank of lieutenant commander, before his marriage to a Frenchwoman, Marie-Gabrielle-Blanche d'Allemont [de Broutillot] (September 19, 1873 - April 15, 1937), forced him to resign his commission.Ernst and Blanche were married on March 14, 1895 in Altona, Hamburg, Schleswig-Holstein, Germany.