Battle of Kursk guns and mortars. In 1943 an offensive by the Soviet Central, Bryansk and Western Fronts against Army Group Centre was abandoned shortly after it began in early March, when the southern flank of the Central Front was threatened by Army Group South. Soviet intelligence received information about German troop concentrations spotted at Orel and Kharkov, as well as details of an intended German offensive in the Kursk sector through the Lucy spy ring in Switzerland. The Soviets verified the intelligence via their spy in Britain, John Cairncross, at the Government Code and Cypher School at Bletchley Park, who clandestinely forwarded
Battle of Kursk the war decreased. The opposite was true for Stalin; throughout the Kursk campaign, he trusted the judgement of his commanders, and as their decisions led to battlefield success it increased his trust in their military judgement. Stalin stepped back from operational planning, only rarely overruling military decisions, resulting in the Red Army gaining more freedom of action during the course of the war. The casualties suffered by the two combatants are difficult to determine, due to several factors. In regard to the Germans, equipment losses were complicated by the fact that they made determined efforts to recover and repair tanks.