Kammala jumla mai zuwa: A watan Afrilun 1942, Kozin ya zama kwamandan rundunar bindigogi ta 8 ta NKVD a yankin Voronezh. A watan Yuni, an canza rukunin zuwa rukunin 'yan bindiga na 63. Rukunin ya yi yaƙi a cikin
Yaƙin Voronezh a lokacin bazara. A ƙarshen Nuwamba, sashin ya yi yaƙi a cikin Operation Uranus. Na 63 ya kasance wani ɓangare na babban harin rundunar ta 21 kuma ya keta tsaron Romanian-Jamus, yana ci gaba zuwa kudu. A yankin ƙauyen Raspopinskaya, sashin ya taimaka gaba ɗaya kewaye da ƙungiyoyi biyu na Sojoji na Uku na Romania tsakanin 21 da 22 ga Nuwamba. An bayar da rahoton cewa hare-haren da aka kai na 63 ya raba aljihun a rabi sannan kuma ya yi amfani da kai hari ta hanyar amfani da battalion na motocin motoci. A yammacin ranar 23 ga Nuwamba, kwamandan rundunar sojin Romaniya ta 14 Janar Stanescu ya mika sojojin 27,000 a cikin aljihun. Saboda ayyukansa, an ba Kozin lambar yabo ta Suvorov ta aji na 2 kuma rukunin ya zama rukunin 'yan bindiga na 52 a ranar 27 ga Nuwamba. Ƙungiyar ta yi yaƙi a cikin hare-haren Soviet don rage Stalingrad Pocket. A ranar 21 ga Janairu, 1943, an daukaka Kozin zuwa Manjo Janar. An ji masa rauni kuma aka kai shi asibiti. Bayan ya warke, an tura Kozin don yin karatu a Makarantar Soja ta Babban Jami'in.