In 2014, the book by B.V. Cherkas was published in Ukraine dedicated to the western uluses of the Golden Horde. All the advantages and disadvantages of this work have been considered in the present review. The reviewer notes that the book allows us to fill in the existing gaps in the history of the Golden Horde. Cherkas revised administrative and territorial structure of the Golden Horde and estimated in a new way foreign policy situation during the khan Uzbek’s epoch. He noted that the beginning of the Golden Horde decline became apparent as early as in the reign of Uzbek. This was due to both natural factors and the offensive of the Europeans against the buffer states, which had been weakened by the Tatar invasion, although they returned to the sphere of the Jochid influence in 1321–1323. Cherkas introduced into historiography a new term – New Western campaign – to designate military operations in 1258–1260 against the Ruthenians, Lithuanians, Poles, Hungarians. He noted that the Mongol commanders preferred to wage war with the forces of their vassals. Based on the analysis of written sources, the researcher established the existence of a large ulus of Kurumyshi and a wing of Muval. Nogai founded his ulus on the territory of Muval’s wing. The ulus of Nogai did not cease to exist with his death: later sons and grandsons of Nogai ruled this ulus as well as one of Batuids and emirs. Centralization of state administration under the khans Uzbek, Janibek and Berdibek was only temporary. Replacing the Chinggisids by emirs was not a panacea for separatism. In addition, the researcher reconstructed the existence of several more uluses on the Dnieper left bank region. These are the ulus of Mankerman in the former principality of Pereyaslavl, the Samara-Orelsky ulus as well as the Crimean ulus. Ulus of Kurumyshi occupied large areas on the right bank of the Dnieper. It was conquered by Europeans in the course of the Hungarian and Lithuanian expansion. Reconstruction of Tokhtamish’s campaign in Podolia and Principality of Kiev in 1380 represents an important achievement of the scholar. Trying to prevent uprisings in the Black Sea uluses, Tokhtamish planted there his relatives and actively used the troops from Muval’s wing during campaigns in Iran and Central Asia. Reviewer’s comments have no fundamental significance and cannot seriously affect the appreciation of the work.