was awarded the Knight's Cross of the Iron Cross with Oak Leaves () on 16 September 1941 after 59 victories which was presented by Adolf Hitler. Three days later, on 19 September, he was promoted to Hauptmann (captain). On 10 April 1942, Nordmann took over command of JG 51 as Geschwaderkommodore from Beckh who was transferred to the Reich Air Ministry. Nordmann was promoted to Major (major) on 18 June 1942. On 26 June 1942 Nordmann crashed his Messerschmitt Bf 109 F-2 (Werknummer 12825—factory number). The aircraft flipped during the landing and Nordmann suffered a basilar fractured skull, an injury typical of high-speed crashes. Although he flew again shortly after the crash his injury required hospitalization in August. Nordmann, who had been assisted by Hauptmann Joachim Müncheberg as a Geschwaderkommodore in training, temporarily replaced him during his absence. On 17 January 1943 Nordmann's Focke-Wulf Fw 190 was involved in a midair collision with Hauptmann Rudolf Busch, Gruppenkommandeur of I./JG 51. Busch was killed and Nordmann, severely injured, did not fly operationally again. In total, Nordmann claimed 78 aerial victories, 69 of which on the Eastern Front, flying over 800 combat missions. Under his leadership JG 51 reported the 4,000th aerial victory on 16 December 1942, the 5,000th victory on 2 June 1943, the 6,000th victory on 27 July 1943 and the 7,000th victory on 15 September 1943. Nordmann, who had been promoted to Oberstleutnant (lieutenant colonel) on 1 August 1943, was appointed Jagdfliegerführer Ostpreussen on 1 April 1944. This command was also later referred to as Jagdabschnittsführer 6 (leader of the 6th fighter sector), while subordinated to the Luftflotte 6 (6th Air Fleet). On 11 November, Reichsmarschall (Marshal of the Realm) Hermann Göring, in his role as commander-in-chief of the Luftwaffe, organized a meeting of high-ranking Luftwaffe officers, including Nordmann. The meeting, also referred to as the "Areopag" was held at the Luftkriegsakademie (air war academy) at Berlin-Gatow. This Luftwaffe version of the Greek Areopagus—a court of justice—aimed at finding solutions to the deteriorating air was situation over Germany. He was appointed Inspekteur der Tagjäger Ost (Inspector of Fighter Operations East) on 4 January 1945 and on 30 January 1945 promoted to Oberst (Colonel). Just prior to the end of the war, on 4 April 1945, he took over command of the 1st Fighter Division until the end of the war. Later life and business career After World War II,