On 5 July 1943 Germany's last strategic offensive on the Eastern Front (Operation Citadel) opened with attacks on the northern and southern shoulders of the Kursk Salient. The objective was to envelop and destroy the defending Central and Voronezh Fronts north and south of Kursk. At that time 40th Army, occupying what was expected to be a relatively quiet sector of the frontline facing the left flank of the German Fourth Panzer Army, was based on seven rifle divisions with armoured support. During the Battle of Kursk, where the Army fought as part of Voronezh Front, it transferred a number of reinforcements to 6th Guards Army to help 6th Guards hold back the 48th Panzer Corps, including the 29th Tank Destroyer Brigade and the 1244th and 869th Tank Destroyer Regiments, a total of over 100 antitank guns. 40th Army also transferred a tank brigade to 38th Army at the same time. After the battle, it was involved in the crossing of the Dnepr in September 1943 in conjunction with airborne operations. The Army was later involved in the Battle of Kiev (1943) and in 1944, as part of 2nd Ukrainian Front, actions around the Korsun-Cherkassy Pocket, Kamenets-Podolsky pocket, and the Uman-Botoshany, Iassy-Kishinev, Bratislava-Brno, and Prague Offensives. It also fought in the Battle of Debrecen, at which, due to its low priority, it only had five divisions assigned. 40th Army was disbanded in July 1945.