Battle of Kursk the total size of the Soviet force was 1,910,361 men, with 1,426,352 actual combat soldiers. Soviet armour strength included 4,869 tanks (including 205 KV-1s heavy tank) and 259 SPGs (including 25 SU-152s, 56 SU-122s and 67 SU-76s) Overall a third of the Soviet tanks at Kursk were light tanks, but in some units this proportion was considerably higher. Of the 3,600 tanks in the Central and Voronezh Fronts in July 1943, 1,061 were light as T-60 and T-70. With very thin armor and small gun, they were unable to effectively engage the frontal armour of German medium and heavy tanks
Battle of Kursk amid poor weather and with the German forces exhausted and in need of refitting, the offensives of Operational Order No. 5 were postponed. On 15 April, Hitler issued Operational Order No. 6, which called for the Kursk offensive operation, codenamed "Zitadelle" ("Citadel"), to begin on 3 May or shortly thereafter. The directive was drafted by Kurt Zeitzler, the OKH Chief of Staff. For the offensive to succeed it was deemed essential to attack before the Soviets had a chance to prepare extensive defences or to launch an offensive of their own. Some military historians have described the operation using the