The book combines three works by the famous historian, which have already received recognition from specialists, and form a kind of trilogy. It examines various aspects of the history of medieval steppe powers. The first part is dedicated to the Mongol Empire of the 13th century, the second to the Golden Horde of the 14th century. and the final one - the Great Horde of the 15th century. Each of the states under consideration, being the successor of the previous one, played an exceptional role in the Eurasian space and in the history of Russia.