Shot down with wounds 12 February, 1942 in his F-2 over the Siwerskaja airfield, S.U.. On 16 May, 1942, no disposition of Biermann is given in this "K 135" incident which happened at the Siwerskaja airfield also. One known Soviet victory, a Yak-1 on 9 May, 1942. One known western victory, a Photo Recon Spitfire 20 km N of Emden on 7 September, 1942. On 17 April, 1943, while in 5/JG-11, flying the Fw 190A-4 & 5, he opposed B-17's, downing one-his 4th victory, over Wilhelmshaven/Emden, flying out of Jever. Another B-17 claimed on 19 May, 1943 on the Kiel raid. His 6th, a B-17 (HSS) at Schaal See on 25 July, 1943. His 7th, a P-47 38 km NW of Nordeney on 27 September, 1943. His 8th, a B-24 off Ile d' Oleron on 31 December, 1943. The Bf 109G-1 in JG-1 was Werk # 14047 "Black 8" in which Biermann made a force landing on 11 July, 1942, W of Emden due to engine trouble. Survived the war; a friend of Knoke.