Robert Karl Georg Hildebrand transferred to the German Air Service on 21 January 1916. After scoring four victories he assumed command of Jasta 13 in the spring of 1918. He scored his fifth victory in June and was transferred to Jasta 69 in July. In August he assumed command of Jasta 53, scoring his sixth and final victory near the end of October.
Kriegsstammrollen, 1914-1918. Bavarian State Archives. Department IV, War Archive, Munich