On 1 October 1942, 3./NJG 1 was redesignated 1./NJG 5. In March and April 1943, General Josef Kammhuber ordered IV./NJG 5 to Rennes, France to protect the German U-boat bases. The group was relocated to the Eastern Front again and redesignated as I./Nachtjagdgeschwader 100.
Western Front
Oberleutnant Walter Borchers was made Gruppenkommandeur of III./NJG 5 on 22 April 1943, leading the Gruppe until March 1944. On the night of 27/28 April, Wilhelm Johnen in a Bf 110 G-4 performed an emergency landing at the Swiss airfield at Zürich-Dubendorf. Johnen and his crew were interned, and the Luftwaffe employed extensive political manoeuvring to ensure the Bf 110, equipped with the still secret SN-2 radar, was kept from close Allied examination and returned intact. At the end of July 1944 I./NJG 5 was withdrawn to Stendal for re-equipment with the new Ju 88G-6night fighter. Then deployed to Jesau in East Prussia, night operations against Soviet bombers followed for the remainder of 1944. Following the opening of the Soviet offensive on 12 January 1945, I./NJG 5 operated in the ground attack role on the eastern front. By 25 January 1945 I./NJG 5 was again operating from bases in Germany, relocating to Parchim and Erfurt. Borchers was shot down and killed on the night of 5 March 1945 by W/C Walter Gibb and F/O Kendall in a Mosquito night fighter of No. 239 Squadron. Flying Junkers Ju 88 G-6 "C9+GA" his air gunner parachuted to safety while his radio operator was also killed. he was replaced by Major Rudolf Schoenert. By the war's end the bulk of NJG 5 were based at Lübeck-Blankensee.
Eastern Front
By early 1943 the Soviet Air Forces were increasing difficulties for the invading German forces. At night harassment sorties were flown with elderly biplanes. The Polikarpov Po-2, known to the Germans as the Nähmaschine, did little damage in night raids but had an immense nuisance value. The aircraft with their slow cruising speed made interception extremely difficult. To counter these attacks IV./NJG 5 under Heinrich Prinz zu Sayn-Wittgenstein was moved to the Eastern Front in February 1943. The unit moved to Bryansk and Orel in June 1943 for Operation Citadel and later operated under Luftflotte 6 in the Smolensk-Bryansk area and under Luftflotte 4 in the Poltava-Stalino area.
