The east-west clay and sand landing field was kidney-shaped with the outline of the racetrack still visible. The western end of the field featured hangars, workshops and a garage for the army. To the immediate east along the southern edge was the guardhouse in Classical/Mediterranean Revival Style architecture, the administrative building in American Craftsman/Mediterranean Revival, and a two-story enlisted barracks in Mission Revival Style. The bluff overlooking the field had the row of officer's quarters. Arnold led the effort to name the facility "Crissy Field" in memory of Major Dana H. Crissy, the base commander of Mather Field, California. Crissy and his observer died on 8 October 1919 in the crash of their de Havilland DH-4B while attempting a landing at Salt Lake City, Utah, during a 61-airplane "transcontinental reliability and endurance test" conducted by the Air Service from the Presidio's field and Roosevelt Field, New York. Construction proceeded throughout 1920, including a seaplane ramp adjacent to the Coast Guard Station on the grounds, and the Army accepted the facility on June 24, 1921, as a sub-post of the Presidio. The first unit assigned to the field, the 91st Observation Squadron, arrived from Mather in August, and the first commanding officer, Major George H. Brett, in October.