Mezue ahịrịokwu na-esonụ: Mgbe ọ laghachiri n'ihu, e kenyere JG 77 na Army Group B nke e hiwere ọhụrụ iji kwado "Fall Blau" (Case Blue), "Wehrmacht" 1942 na-eme atụmatụ n'oge okpomọkụ na ndịda Russia. Na 5 Julaị 1942, II./JG 77 nọ na Kastornoje, ihe dị ka ọdịda anyanwụ Voronezh, ebe ọ lụrụ ọgụ na
Agha nke Voronezh. Setz duziri II./JG 77 na July maka "Gruppenkommandeur" (onye isi otu) Anton Mader. O kwuru na ya nwere MiG-3 abụọ na 23 Julaị 1942. N'echi ya, na 24 Julaị, o meriri nke ugboro 100 n'elu igwe. Ọ bụ onye ọkwọ ụgbọelu nke 13 nke Luftwaffe iji nweta akara narị afọ. Ihe a ọ rụzuru mere ka o nweta German Cross in Gold () nke e nyere ya na 21 Ọgọst 1942. Na 16 Septemba, Setz, maka oge nke abụọ, ghọrọ "ace-na-a-ụbọchị" mgbe ọ kwupụtara mbibi nke ụgbọ elu atọ LaGG-3 na ụgbọ elu agha abụọ Ilyushin Il-2, na-ewere ngụkọta ya na 133 mmeri ikuku. Setz dị afọ 4. "Staffel" e mesịa jiri Bf 109 G-2 ma bufee ya n'ọdụ ụgbọ elu dị na Stary Oskol na 23 Septemba 1942. N'October 2, 4. Na 6. "Staffel" gbara ụgbọelu na-esochi ụgbọelu Heinkel He 111 na-awakpo ọnọdụ ndị Soviet dị n'ebe ugwu Voronezh. N'ọrụ a, Setz kwuru na ya nwere LaGG-3 abụọ, mmeri ikpeazụ ya na Eastern Front. Nke a mere ka ngụkọta nke mmeri ya site n'ikuku ruo 135. E buliri Setz n'ọkwa "Hauptmann" na 1 Nọvemba 1942. Na November 7, 1942, II. "Gruppe" natara iwu site n'aka "Generalmajor" Alfred Bülowius, onye isi nke 1. "Flieger-Division" (1st Air Division), ịkwaga ebe a na-eme ihe nkiri North Africa.