Kammala jumla mai zuwa: An zaɓe shi ya zama shugaban ma'aikata na Rundunar Sojojin Tank na 3 a cikin tsari wanda ya kafa shi a ranar 14 ga Mayu kuma an daukaka shi zuwa babban janar na sojojin tanki a ranar 7 ga Yuni. Sojojin sun yi yaƙi a cikin Operation Kutuzov a matsayin wani ɓangare na Bryansk Front daga Yuli. Daga watan Satumba sojojin suka yi yaƙi a yakin Dnieper, da
Yaƙin Kiev, Zhitomir<unk>Berdichev Offensive, da Proskurov<unk>Chernovitsy Offensive. A matsayin shugaban ma'aikatan sojojin, an kimanta Mitrofanov a matsayin "ya taka rawar gani wajen tsara ayyukan sojojin, yana tabbatar da umarni da kuma kula da dakarun da ba a karya ba bisa ga shawarar kwamandan sojojin", da kuma "nuna kyakkyawan ilimin ma'aikata da sanin fasahar aiki". Ya zama mataimakin kwamandan rundunar a watan Mayu na 1944 kuma ya dauki umurnin rundunar Sojoji ta 7th Guards Tank Corps a watan Yuli bayan da kwamandansa ya ji rauni. Mitrofanov ya jagoranci rundunar a cikin hare-hare masu nasara yayin Lvov<unk>Sandomierz Offensive, wanda ya kama Gorodok da Lvov, kuma ya yi yaƙi a yaƙe-yaƙe don Sandomierz bridgehead. Don ƙarfin hali da ƙwarewa a cikin waɗannan yaƙe-yaƙe, an ba wa rundunarsa lambar yabo ta Suvorov.