Kammala wannan jumlar: A farkon Yaƙin Girma na Patriotic, ya umurci ƙungiyoyin bindigogi na 7 na Mechanized Corps. Kazakov ya shiga cikin fadace-fadace na Smolensk da Moscow, kuma ya haɓaka sabbin hanyoyin amfani da bindigogi na anti-tank, wanda sojojin suka karɓa. A watan Yulin 1942 an sanya shi kwamandan mayakan Rokossovsky a Bryansk Front. A wannan matsayin, ya ci gaba da aiki tare da Janar a Stalingrad, Don, Tsakiya da 1st Belorussian Fronts. A ranar 17 ga Nuwamba, 1942, ya zama Laftanar Janar, kuma an sanya shi Kanar Janar a ranar 18 ga Satumba, 1943. Kazakov yana cikin masu tsara shirin
Kursk mai zurfin layin tsaro. Ya shiga cikin Lower Dnieper Offensive, a cikin Operation Bagration da kuma fadace-fadace a cikin Jamus. Saboda gudummawar da ya bayar a cikin Vistula-Oder Offensive, an ba Kazakov lambar yabo ta Jarumin Tarayyar Soviet (Lambar yabo mai lamba 5871) a ranar 6 ga Afrilu 1945.