The Battle of Kursk is rightfully considered a turning point in the Great Patriotic War. After the crushing defeat of the Wehrmacht on the Arc of Fire, the outcome of World War II was a foregone conclusion. Previous books by V.N. Zamulin’s “Kursk Break” and “The Secret Battle of Kursk” aroused great interest among readers and professional historians, both domestic and foreign. In his new work, the author highlights the last “blank spot” in the history of the Kursk defensive operation - the battles near Belgorod and in the Korochan direction, where the formations of the Kempf army group were opposed by the 7th Guards, which became famous in Stalingrad. army of General Shumilov. For the first time in Russian military-historical literature, the course of fierce battles south of Prokhorovka is described in detail, by day and hour; on the basis of recently declassified documents, the process of the collapse of Operation Citadel is analyzed, as well as the main reasons for the decisive victories and local failures of the Red Army in Battle of Kursk.