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 retreat and increasingly lost tanks in combat as well as from abandoning and destroying damaged vehicles. Across the entire Eastern Front 50 Tiger tanks were lost during July and August, with some 240 damaged. Most of these occurred during their offensive at Kursk. Between 600 to 1,612 tanks and assault guns sustained damage in the period from 5 July to 18 July. The total number of German tanks and assault guns destroyed during July and August along the entire Eastern Front amount to 1,331. Of these, Frieser estimates that 760 were destroyed during the Battle of Kursk. Beevor writes that