Wilberg joined the 80. FusilierRegiment "von Gersdorff" on 18 April 1899. He was promoted to Leutnant on 27 January 1900 lieutenant. Starting in 1906, he worked as an instructor at the cadet schools at Naumburg and Lichterfelde. On 18 October 1909 he was promoted to Oberleutnant. In 1911, he wrote the paper, "Aerial Reconnaissance in Kaisermanöver 1911: Its value and influence on leadership compared with the cavalry reconnaissance". In 1913, he enlisted in the Luftstreitkräfte, and was one of Germany's first military pilots. When war broke out he was a Hauptmann and commanding officer of 11. Feldfliegerabteilung. He later served as Kommandeur der Flieger of Fourth Army. After the war, he was transferred to the Reichswehr. He served there until 1927, when he transferred to the Ministry of Defense; he also served with the Truppenamt, and finally as head of Luftschutzreferats. He later joined 18. Infantry Regiment as a battalion commander, with the rank of Oberstleutnant. From 1929 to 1932, he commanded the Breslau vicinity, being appointed Generalmajor. He headed the Reichswehr air staff for eight years in the 1920s. Hermann Göring, in command of the Luftwaffe, considered making Wilberg Chief of Staff. However, it was revealed Wilberg had a Jewish mother. Not wishing his talent to go to waste, Göring had him reclassified "Aryan" and Wilberg remained in the air staff, helping draw up its principal doctrine, "The Conduct of the Aerial War", and its "Regulation 16" under Walther Wever. In subsequent years, he worked secretly on rebuilding the Luftwaffe, which he joined in 1934. Wilberg was initially a department head in the Reichsluftfahrtministerium. In 1935, he took over the construction of the air war school in Werder an der Havel, and later the Higher Air Force School in Berlin. Wilberg significantly influenced German air war doctrine. In 1937, he created "Special Staff W", responsible for collecting and analyzing the tactical lessons learned by the Legion Kondor during the Spanish Civil War. In March 1938, he was promoted General der Flieger. In the mobilization of the Polish campaign in 1939, Wilberg was reactivated and used as head of aviation training command. On 20 November 1941, he was killed in a plane crash near Dresden, on his way to the funeral of Ernst Udet.
