 Complete the following phrase:  On 18 May 1942, Wilcke was transferred to Jagdgeschwader 3 Udet JG 33rd Fighter Wing, named after the World War I fighter ace Ernst Udet. Operating on the Eastern Front, Wilcke became a Geschwaderkommodore of JG 3 Udet on 11 August, replacing Oberst Colonel Günther Lützow, who was posted to the staff of the General der Jagdflieger General of Fighters as Inspector of the Day Fighters on the Eastern Front. Operating from the Chuguyev Airfield, JG  3 Udet saw combat in the Kharkov area, present-day Kharkiv, during the 