Born in Bochum, Bergmann volunteered for military service in the Luftwaffe of Nazi Germany in 1939 after finishing school. Following flight training, he was initially posted to Nachtjagdgeschwader 1 (NJG 1—1st Night Fighter Wing) in 1941 before he transferred to Nachtjagdgeschwader 4 (NJG 4—4th Night Fighter Wing). He claimed his first aerial victory on 19/20 September 1942 and was awarded the Knight's Cross of the Iron Cross on 9 June 1944. Two months later, on 6 August 1944, he and his crew were killed in action during Operation Lüttich.
After completing pilot training in July 1941, he was assigned to the Ergänzungsstaffel (Training/Supplement Squadron) of Nachtjagdgeschwader 1 (NJG 1—1st Night Fighter Wing) on 15 July.[6]
World War II
Following the 1939 aerial Battle of the Heligoland Bight, bombing missions by the Royal Air Force (RAF) shifted to the cover of darkness, initiating the Defence of the Reich campaign.[7] By mid-1940, Generalmajor (Brigadier General) Josef Kammhuber had established a night air defense system dubbed the Kammhuber Line. It consisted of a series of control sectors equipped with radars and searchlights and an associated night fighter. Each sector, named a Himmelbett (canopy bed), would direct the night fighter into visual range with target bombers. In 1941, the Luftwaffe started equipping night fighters with airborne radar such as the Lichtenstein radar. This airborne radar did not come into general use until early 1942.[8]
Bergmann was assigned to 7. Staffel (7th squadron) of Nachtjagdgeschwader 4 (NJG 4—4th Night Fighter Wing) on 1 May 1942.[6] He was credited with his first aerial victory on 19/20 September 1942, an Armstrong Whitworth Whitley bomber, claimed shot down at 00:01 approximately 10 kilometres (6.2 miles) south of Verdun.[9] Bergmann was promoted to Oberleutnant (first lieutenant) on 1 April 1943.[10] On 22 April, he was appointed Staffelkapitän of 8. Staffel of NJG 4.[6] On 23 June 1943, Bergmann and his crew were forced to bail out of their Messerschmitt Bf 110 G-4 (Werknummer 5334—factory number) following aerial combat north of Harderwijk and were injured.[11]
10/11 April 1944
Bergmann claimed seven Avro Lancaster bombers shot down in 46 minutes on the night of 10/11 April 1944, all from an RAF Bomber Command raid on the Aulnoye-Aymeries rail marshalling yard on the Franco-Belgian frontier.[Note 3] All of his seven claims were confirmed and 38 Allied aircrew were killed.[13] This was Bergmann's most successful sortie, making him an "ace-in-a-day" for the first time.[14]
On 4 May 1944, Bergmann was transferred to 6. Staffel of NJG 4. That evening, he claimed five further aerial victories.[16][Note 4] On 9 June 1944, he was awarded the Knight's Cross of the Iron Cross (Ritterkreuz des Eisernen Kreuzes) following his 34th aerial victory.[6] The award documentation was signed on 27 September 1944, at the time, Bergmann and his crew were considered missing in action.[18]
According to Spick, Bergmann was credited with 36 nocturnal aerial victories, claimed in approximately 135 combat missions.[22] Foreman, Mathews and Parry, authors of Luftwaffe Night Fighter Claims 1939 – 1945, list 34 nocturnal victory claims, numerically ranging from 1 to 35, not listing his 18th claim.[23] Mathews and Foreman also published Luftwaffe Aces — Biographies and Victory Claims, listing Bergmann with 33 claims, plus two further unconfirmed claims.[14]
Chronicle of aerial victories
This and the ♠ (Ace of spades) indicates those aerial victories which made Bergmann an "ace-in-a-day", a term which designates a fighter pilot who has shot down five or more airplanes in a single day.
This and the – (dash) indicates unwitnessed aerial victory claims for which Bergmann did not receive credit.
This and the ? (question mark) indicates discrepancies between Luftwaffe Night Fighter Claims 1939 – 1945 and Luftwaffe Aces — Biographies and Victory Claims.
^Flight training in the Luftwaffe progressed through the levels A1, A2 and B1, B2, referred to as A/B flight training. A training included theoretical and practical training in aerobatics, navigation, long-distance flights and dead-stick landings. The B courses included high-altitude flights, instrument flights, night landings and training to handle the aircraft in difficult situations. For pilots destined to fly multi-engine aircraft, the training was completed with the Luftwaffe Advanced Pilot's Certificate (Erweiterter Luftwaffen-Flugzeugführerschein), also known as the C-Certificate.[3]
^According to Boiten, he claimed six Lancasters shot down.[12]
^According to Ziefle, Bergmann claimed six aerial victories on the night of 3/4 May 1944.[17]
^ abAccording to Luftwaffe Aces — Biographies and Victory Claims claimed while flying with III. Gruppe of Nachtjagdgeschwader 4 while Luftwaffe Night Fighter Claims 1939 – 1945 states Nachtjagdgeschwader 1.[14][37]
^According to Luftwaffe Aces — Biographies and Victory Claims, this claim is unconfirmed.[14]
^This unconfirmed claim is not listed in Luftwaffe Night Fighter Claims 1939 – 1945.[54]
Cunliffe, Peter Wilson (2013). A Shaky Do: The Skoda Works Raid 16/17th April 1943. 2QT Limited. ISBN978-1-908098-46-7.
Fellgiebel, Walther-Peer[in German] (2000) [1986]. Die Träger des Ritterkreuzes des Eisernen Kreuzes 1939–1945 — Die Inhaber der höchsten Auszeichnung des Zweiten Weltkrieges aller Wehrmachtteile [The Bearers of the Knight's Cross of the Iron Cross 1939–1945 — The Owners of the Highest Award of the Second World War of all Wehrmacht Branches] (in German). Friedberg, Germany: Podzun-Pallas. ISBN978-3-7909-0284-6.
Foreman, John; Parry, Simon; Mathews, Johannes (2004). Luftwaffe Night Fighter Claims 1939–1945. Walton on Thames: Red Kite. ISBN978-0-9538061-4-0.
Mathews, Andrew Johannes; Foreman, John (2014). Luftwaffe Aces — Biographies and Victory Claims — Volume 1 A–F. Walton on Thames: Red Kite. ISBN978-1-906592-18-9.
Nimmo, Stuart (2012). Perilous Moon:Occupied France, 1944 — The End Game. Philadelphia & Oxford: Casemate Publication. ISBN978-1-61200-124-1.
Obermaier, Ernst (1989). Die Ritterkreuzträger der Luftwaffe Jagdflieger 1939 – 1945 [The Knight's Cross Bearers of the Luftwaffe Fighter Force 1939 – 1945] (in German). Mainz, Germany: Verlag Dieter Hoffmann. ISBN978-3-87341-065-7.
Patzwall, Klaus D.; Scherzer, Veit (2001). Das Deutsche Kreuz 1941 – 1945 Geschichte und Inhaber Band II [The German Cross 1941 – 1945 History and Recipients Volume 2] (in German). Norderstedt, Germany: Verlag Klaus D. Patzwall. ISBN978-3-931533-45-8.
Patzwall, Klaus D. (2008). Der Ehrenpokal für besondere Leistung im Luftkrieg [The Honor Goblet for Outstanding Achievement in the Air War] (in German). Norderstedt, Germany: Verlag Klaus D. Patzwall. ISBN978-3-931533-08-3.
Scherzer, Veit (2007). Die Ritterkreuzträger 1939–1945 Die Inhaber des Ritterkreuzes des Eisernen Kreuzes 1939 von Heer, Luftwaffe, Kriegsmarine, Waffen-SS, Volkssturm sowie mit Deutschland verbündeter Streitkräfte nach den Unterlagen des Bundesarchives [The Knight's Cross Bearers 1939–1945 The Holders of the Knight's Cross of the Iron Cross 1939 by Army, Air Force, Navy, Waffen-SS, Volkssturm and Allied Forces with Germany According to the Documents of the Federal Archives] (in German). Jena, Germany: Scherzers Militaer-Verlag. ISBN978-3-938845-17-2.
Ziefle, Michael (2013). Messerschmitt Bf 110: Die Rehabilitierung eines Flugzeuges [Messerschmitt Bf 110: The Rehabilitation of an Airplane] (in German). Norderstedt, Germany: Books on Demand. ISBN978-3-8482-8879-3.