The June tank battle of 1941 in the triangle of Луцк-Броды-Дубно until now remains one of the most enigmatic pages of home history. Participating in him five mechanized corps of the Kyiv Special territorial department counted 2800 tanks of all types, from the lungs of БТ and Т- 26 to the giants of КВ- 2 and Т- 35. Resisted to them only near 800 tanks and САУ of 1th tank group background of Клейста, from that only 450 Pz.III and Pz.IV. If these two tank armadas simply clashed on the field of suitable sizes like knight's cavalry, end of battle it would be easily to predict. However in reality soviet мехкорпуса lost greater part of бронетехники and already in a week began retreat.How could such happen? Why, in spite of repressing numeral superiority, did a soviet counterblow come short? How did Germans succeed to manage from 340 newest KB and Т- 34? What reasons are in shattering defeat of Red Army under Дубно?The new book of leading military historian, based on the recently declassified documents of both home and foreign archives, first presents not only soviet but also German point of view on the greatest tank battle to Second world.