 Complete the following phrase:  At the beginning of 1943 it was reorganised as the 78th Sturm Division a new divisional symbol, an armoured fist, being adopted, derived from the artificial hand of Götz von Berlichingen with additional adjustments to its strength and organisation over the next several months. Each of its three infantry regiments was redesignated as a Sturm-Regiment. The designation Sturm assault reflected the divisions increased strength, which eventually included subordinate Sturmgeschutz assault gun Heavy Mortar and Nebelwerfer rocket launcher battalions and a tank destroyer unit equipped with Marder IIs, as well as extra regimental artillery support. With its new organisation, the division took part in Operation Citadel as part of the XXIII Corps of the Ninth Army, being involved in the fighting at Ponyri. During the following Soviet 