other ships until assigned to the battleship in June 1915 as Commanding Officer. Detached for shore duty at the Mare Island Naval Shipyard in California in June 1916, he then commanded the battleship during World War I, earning the Navy Cross for "exceptionally meritorious service" during that tour. Post–World War I Assignments After the war he served as Naval Attaché at Rome and in April 1921 assumed command of the cruiser . Captain of the Mare Island Navy Yard at the end of that year, he afterwards commanded the battleship in 1922–23, then attended the Naval War College at Newport. After completing his coursework, he spent a year as a member of the staff. Entering Naval Aviation Upon completing his tour at the War College, Captain Reeves decided to enter the new world of naval aviation. In order to hold a command post, however, he needed to receive aviation training. Like other older officers—notably, RADM William A. Moffett, Chief of the Navy's new Bureau of Aeronautics—Reeves qualified as a "Naval Aviation Observer" rather than as a "Naval Aviator" (i.e., a pilot). He received his qualification in 1925 and assumed the post of Commander, Aircraft Squadron, Battle Fleet. Though a captain by rank, his position as squadron commander permitted him to fly a commodore's pennant. His flagship was the experimental carrier USS Langley—his old ship, Jupiter, modified for aviation operations. The wooden flight-deck was installed over the Langley's existing deck structures, giving the vessel the nickname of "Covered Wagon." While in this command, Reeves worked hard to develop carrier aviation tactics, seeking to increase sortie rates and the use of dive-bombing. He proved these concepts by the success of his pilots and aircrew during the Navy's annual fleet exercises (known as "Fleet Problems"). Reeves served on the Navy's General Board, June 1929–June 1930. Fifteen months later he became Senior Member of the Board of Inspection and Survey, Pacific Coast Section. Another tour at Mare Island followed and in June 1933 he became Commander, Battleships, Battle Force, with the rank of vice admiral. In July, he was assigned as Commander, Battle Force, U.S. Fleet, with the rank of admiral. On February 26, 1934, Admiral Reeves was designated Commander-in-Chief, U.S. Fleet. He held this command until June 1936, when he was ordered to Washington, D.C., to serve on the General Board. He held the Board position until November 23, 1936, and retired seven