The book is dedicated to the heroic struggle of the Russian people against the Horde yoke - its decisive stage, which begins with the Battle of Kulikovo in 1380 and ends in the fall of 1480, when Russian soldiers rebuffed the invasion of Khan Great Horde Ahmed on the Ugra River. Liberation from foreign oppression is presented by the author of the book as a natural result of the long and selfless struggle of the Russian people against the conquerors.