Whakaotihia te rerenga e whai ake nei: I te Paenga-whāwhā o te tau 1942, ko Kozin te rangatira o te 8th Motor Rifle Division NKVD i te rohe o Voronezh. I te marama o Hune, i hurihia te wehenga hei 63rd Rifle Division. I whawhai te wehenga i te
Te Pakanga o Voronezh i te raumati. I te mutunga o Whiringa-a-rangi, i whawhai te wehenga i te Operation Uranus. Ko te 63rd he waahanga o te whakaeke nui o te 21 Army ka pakaru i nga paruru Romanian-Tiamana, ka anga whakamua ki te tonga. I roto i te rohe o te kainga o Raspopinskaya, i awhina te wehenga ki te karapoti i nga roopu e rua o te Roopu Tuatoru o Romania i waenga i te 21 me te 22 o Noema. Ko nga whakaeke a te 63 o nga whakapae i wehe i te putea ki te haurua ka whakaata i te whakaeke miihini ma te whakamahi i te roopu waka waka o te wehenga. I te ahiahi o te Whiringa-a-rangi 23, ko te rangatira o te 14th Infantry Division Romanian General Stanescu i tuku i nga hoia 27,000 i roto i te pute. Mo ana mahi, i whakawhiwhia a Kozin ki te Tohu o Suvorov 2nd akomanga ana ka huri te wehenga hei 52nd Guards Rifle Division i te 27 o Noema. I whawhai te wehenga i nga whakaeke a te Soviet ki te whakaiti i te Pocket Stalingrad. I te 21 o Hanuere 1943, i whakatairangahia a Kozin ki te rangatira nui. I whara ia, i tukuna ki te hōhipera. Whai muri i tana whakaoranga, i tukuna a Kozin ki te ako i te Whare Wananga o te Ope Matua.