9 August, he claimed his first aerial victory on the Fw 190. That day, the RAF had sent a "Rodeo" to Neufchâtel-Hardelot and Borris claimed a No. 403 Squadron Spitfire shot down near Campagne. On 20 September, the RAF Fighter Command flew three "Circuses" simultaneously; No. 100A targeted the Hazebrouck motor yards, No. 100B the Abbeville motor yards, and No. 100C hit the Rouen shipyards. In defense of this attack, Borris was credited with destruction of Spitfire, claimed at 16:57 near Mardyck. The next day, "Circus" No. 101 consisting of twelve Bristol Blenheim bombers and escorted by fourteen squadrons of Spitfires and Hurricanes targeted Béthune and Gosnay. In combat over Étaples, Borris managed to shoot down a No. 315 Polish Fighter Squadron Spitfire at 16:30. Squadron leader On 6 November 1941, Hauptmann Johann Schmid, the Staffelkapitän of 8. Staffel, was killed in action. In consequence, Borris was transferred and chosen as his successor. 8. Staffel was a squadron of III. Gruppe and at the time commanded by Major Gerhard Schöpfel. Borris claimed his first aerial victory whilst flying with 8. Staffel on 13 March 1942. By this date, his Fw 190 had been equipped with the FuG 25a Erstling, an identification friend or foe transponder, allowing German radar operators to distinguish between friendly and enemy aircraft. That day, the RAF sent "Circus" No. 114 to bomb the railway yards at Hazebrouck. III. Gruppe was dispatched and fought a lengthy air battle with the Kenley Wing. During this air battle, Borris downed a No. 602 Squadron Spitfire for his tenth aerial victory. During the Dieppe Raid on 19 August 1942, on III. Gruppes second patrol of the day, a flight led by Borris and Oberleutnant Klaus Mietusch took off from Wevelgem airfield at 09:36. The flight intercepted Spitfire fighters from No. 19 and No. 121 Squadron, an Eagle Squadron. In this encounter, Borris claimed a Spitfire shot down at 10:15 in the vicinity of Dieppe. Following this 21st aerial victory claim, he was awarded the German Cross in Gold () on 8 September. Defense of the Reich On 14 May 1943, the United States Army Air Forces (USAAF) targeted four separate targets in Germany, Belgium and the Netherlands. In defense of this attack, Borris was shot down in his Fw 190 A-5 (Werknummer 7326—factory number) by the defensive gunfire of a Boeing B-17 Flying Fortress bomber in combat near Wevelgem. He