The book reconstructs the ethno-political history of East Dasht-i Kypchak in the XIII-XV centuries. The course of the entry of the territory of East Dasht-i Kypchak into the Mongol Empire, the formation of the uluses of Jochi and his sons Orda, Batu and Shiban are considered. A new vision of the problem of the terms Ak-Orda and Kok-Orda is proposed. The political processes that took place in the eastern part of Ulus Jochi - Ak-Orde are analyzed; the periods of formation and strengthening of the khanate are indicated, the reasons that caused the weakening and decline of the Ak-Horde are shown.