Ramba uchiverenga ndima ino - Mushure mokudzokera kwake kunhare, JG 77 yakapiwa kuBoka reMauto B rakanga richangobva kuumbwa mukutsigira "Fall Blau" (Case Blue), "Wehrmacht"'s 1942 strategic summer offensive kumaodzanyemba kweRussia. Musi wa5 Chikunguru 1942, II./JG 77 yaive yakavakirwa paKastornoje, inenge kumadokero kweVoronezh, kwayakarwa muhondo yeVoronezh
. Setz akarayira kwenguva pfupi II./JG 77 muna Chikunguru we "Gruppenkommandeur" (murayiridzi weboka) Anton Mader. Iye akati maviri MiG-3s musi 23 July 1942. Zuva rakatevera racho, 24 July, akawana kukunda kwake kwechi100 mumhepo. Akanga ari mutyairi wendege wechi13 weLuftwaffe akawana zana remakore. Kubudirira uku kwakamuwanisa muchinjikwa weGerman muGoridhe () uyo wakapihwa kwaari musi wa21 Nyamavhuvhu 1942. Musi wa16 Gunyana, Setz, kechipiri, akava "ace-in-a-day" mushure mekunge ati akaparadza ndege nhatu dzevarwi dzeLaGG-3 uye maviri ndege dzepasi dzeIlyushin Il-2, achitora kukunda kwake kwese kusvika ku133. Setz ane makore 4. "Staffel" akanga ipapo reequipped pamwe Bf 109 G-2 uye kuchinjwa kuti airfield pa Stary Oskol musi 23 September 1942. Musi waOctober 2, 4. Uye 6. "Staffel" akabhururuka murwi escort basa kutiza Heinkel He 111 bhomba kurwisa Soviet nzvimbo kuchamhembe Voronezh. Pabasa iri, Setz akawana LaGG-3 mbiri, kukunda kwake kwokupedzisira kuEastern Front. Ikoku kwakamuendesa kukunda kwake kwose kunenge 135 mumhepo. Setz akasimudzirwa kuva "Hauptmann" pana 1 November 1942. Musi waNovember 7, 1942, II. "Gruppe" yakagamuchira mirairo kubva kuna "Generalmajor" Alfred Bülowius, mutungamiri we1. "Flieger-Division" (1st Air Division), kutamisirwa kunzvimbo yeNorth Africa yemabasa.