while one of the Spitfire fighters claimed a probable victory over Glunz. Glunz also claimed one of the Spitfires shot down but both American pilots returned safely. Glunz claimed his tenth aerial victory during Operation Donnerkeil. The objective of this operation was to give the German battleships and and the heavy cruiser fighter protection in the breakout from Brest to Germany. The Channel Dash operation (11–13 February 1942) by the Kriegsmarine was codenamed Operation Cerberus by the Germans. In support of this, the Luftwaffe, formulated an air superiority plan dubbed Operation Donnerkeil for the protection of the three German capital ships. Glunz was credited with a Spitfire from either No. 118 or No. 234 Squadron shot down at 17:08 on 12 February east of Eu. On 13 March, Glunz attacked a flight of Spitfire fighters from the RCAF No. 401 Squadron over the English Channel, off Dungeness. In this encounter, he claimed one of the Spitfires shot down. On 10 April, the RAF flew two "Rodeos", providing a diversion for a "Ramrod" short range bomber attack missions targeting Boulogne. JG 26 lost three aircraft, including two pilots killed in action, for six aerial victories claimed. Glunz claimed a No. 340 (Free French) Squadron Spitfire shot down at 17:43 near Étaples. On 14 April 1942, Glunz claimed a Spitfire shot down from No. 317 Squadron near Calais. The RAF flew one "Circus" and two "Ramrods" in the area of Pas de Calais. "Circus" Nr. 137 targeted the Luftwaffe the Abbeville Airfield. Defending against this attack, Glunz was credited with shooting down a Spitfire fighter near Abbeville. Glunz was wounded during an aerial attack on the Abbeville Airfield. The attack occurred while he was sitting on the toilet, forcing him to seek cover with lowered trousers. He was then wounded by flying glass fragments in the buttock. Since the injuries were caused by enemy action, he was awarded the Wound Badge in Black () in April 1942. He considered the circumstances of the injury too embarrassing and never wore the decoration. Seageant George Beurling, a Canadian fighter pilot serving with No. 41 Squadron, may have been credited with shooting down Glunz on 1 May. Gun camera footage revealed two hits on a Fw 190 and Beurling was credited with his first aerial victory although Glunz returned safely. On 17 May, he shot down a No. 602 Squadron Spitfire near Ardres. The Spitfire