Zachary Lansdowne graduated from the U.S. Naval Academy at Annapolis, Class of 1909. After completing his aviation training, he became Naval Aviator 105. He was assigned to duty with the Royal Naval Air Service during and after World War I, to study dirigibles. On 11 February 1924 Lansdowne took command of the rigid lighter-than-air ship, U.S.S. Shenandoah (ZR-1), and was killed when she crashed at Ava, Ohio, on September 3, 1925. His death was the “final straw” for Lansdowne’s personal friend General Billy Mitchell who, upon Lansdowne’s death, began the remarks related to problems in military aviation that led to his subsequent courts martial.