Kammala jumla mai zuwa: A ranar 5 ga Yuli, 1943, hare-haren da Jamus ta yi na karshe a Gabas ta Gabas (Operation Citadel) ya fara ne da hare-haren da aka kai a arewacin kudancin Kursk Salient. Manufar ita ce ta kewaye da lalata Tsakiyar Tsakiya da Voronezh a arewa da kudu da Kursk. A wannan lokacin rundunar soji ta 40, ta mamaye abin da ake tsammanin zai zama wani yanki mai natsuwa na layin gaba da ke fuskantar gefen hagu na Sojojin Panzer na hudu na Jamus, an kafa shi ne a kan ƙungiyoyi bakwai na bindigogi tare da tallafin makamai. A lokacin yakin Kursk, inda Sojojin suka yi yaƙi a matsayin wani ɓangare na Voronezh Front, ya tura wasu ƙarfafawa zuwa Rundunar Tsaro ta 6 don taimakawa Tsaro ta 6 ta riƙe da Panzer Corps na 48, ciki har da Brigade na Tank na 29 da 1244th da 869th Tank Destroyer Regiments, jimillar sama da bindigogi 100. Rundunar soji ta 40 ta kuma canja brigade na tank zuwa rundunar soji ta 38 a lokaci guda. Bayan yaƙin, ya shiga cikin ƙetare Dnepr a watan Satumbar 1943 tare da ayyukan iska. Daga bisani sojojin sun shiga cikin
Yaƙin Kiev (1943) kuma a cikin 1944, a matsayin wani ɓangare na 2nd Ukrainian Front, ayyuka a kusa da Korsun-Cherkassy Aljihu, Kamenets-Podolsky aljihu, da Uman-Botoshany, Iassy-Kishinev, Bratislava-Brno, da Prague Offensives. Hakanan ya yi yaƙi a Yaƙin Debrecen, wanda, saboda ƙarancin fifiko, an ba shi rarrabuwa biyar kawai. An rushe rundunar soji ta 40 a watan Yulin 1945.