The second part of the trilogy of the historian P.E. Bukeikhanov about the Battle of Kursk, the Battle of Kursk. Fracture. The battle on the southern front of the Kursk Bulge. The collapse of Operation Citadel 1943 includes a study of Operation Citadel on the southern front of the Kursk Bulge. An extensive documentary material, including from the funds of the Central Archive of the Ministry of Defense, shows the course of the summer offensive of German troops on Kursk in the Voronezh Front strip, analyzed the reasons and conditions that determined the outcome of Operation Citadel, and attempted to identify the patterns that determined the results of the entire Battle of Kursk.