Battle of Kursk were mostly behind Army Group North and Army Group Centre. In June 1943, partisans operating in the occupied area behind Army Group Centre destroyed 298 locomotives, 1,222 railway wagons and 44 bridges, and in the Kursk sector there were 1,092 partisan attacks on railways. These attacks delayed the build-up of German supplies and equipment, and required the diversion of German troops to suppress the partisans, delaying their training for the offensive. Central Partisan Headquarters coordinated many of these attacks. In June Soviet Air Forces (VVS) flew over 800 sorties at night to resupply the partisan groups operating behind Army Group
Battle of Kursk a small area in the immediate environs of Kursk. The combined depth of the three main defensive zones was about . The six defensive belts on either side of Kursk were deep. If the Germans managed to break through these defences they would still be confronted by additional defensive belts to the east, manned by the Steppe Front. These brought the total depth of the defences to nearly . The Voronezh and Central Fronts dug and of trenches respectively, laid out in criss-cross pattern for ease of movement. The Soviets built more than 686 bridges and about of roads in