Knight's Cross of the Iron Cross with Oak Leaves () on 2 August 1943. The presentation was made by Adolf Hitler at the Wolf's Lair, Hitler's headquarters in Rastenburg, present-day Kętrzyn in Poland. Five other Luftwaffe officers were presented with awards that day by Hitler, Hauptmann Egmont Prinz zur Lippe-Weißenfeld, Hauptmann Heinrich Ehrler, Hauptmann Manfred Meurer, Hauptmann Werner Schröer, Oberleutnant Theodor Weissenberger were also awarded the Oak Leaves, and Major Helmut Lent received the Swords to his Knight's Cross with Oak Leaves. Defense of the Reich In early August 1943, II. Gruppe was withdrawn from the Eastern Front for service in Defense of the Reich on the Western Front. The Gruppe spent one-month training in northern Germany before they arrived at the Schiphol Airfield near Amsterdam in the Netherlands on 12 September. While based at Uetersen Airfield, the Gruppe received the Bf 109 G-6 which was equipped with Y-Control for fighters, a system used to control groups of fighters intercepting United States Army Air Forces (USAAF) bomber formations. On 24 September, II. Gruppe for the first engaged in combat with USAAF bombers. Guided by Y-Control, the Gruppe intercepted approximately 80 to 100 Boeing B-17 Flying Fortress bombers over sea. During this encounter, Kirschner shot down one of the B-17 bombers. On 27 September, the USAAF VIII Bomber Command attacked the industrial areas and shipyards of Emden. Drop tank equipped Republic P-47 Thunderbolt for the first time escorted the bombers all the way to the target in Germany. The attack force was detected at 10:20 west of Terschelling heading east. At 10:33, II. Gruppe was scrambled. In the following encounter, Kirschner claimed a P-47 fighter shot down. On 2 October, VIII Bomber Command again headed for Emden. Defending against this attack, Kirschner claimed a B-17 bomber shot down. The following day, 140 Martin B-26 Marauder bombers, escorted by P-47 and Spitfire fighters, attacked the German airfields at Schiphol, Woensdrecht and Haamstede. II. Gruppe was unable to reach the bombers as they were engaged by the P-47 and Spitfire fighters. During this dogfight, Kirschner shot down one of the Spitfire fighters. On 4 October, VIII Bomber Command attacked Frankfurt am Main. German defenses failed to prevent the bombing. Luftwaffe pilots only claimed 14 aerial victories that day, including a B-17 bomber shot down by Kirschner. This was also Kirschner's last aerial victory in Defense of the Reich. He was transferred on 18