The book, based on oriental written sources and modern scientific works, sets out the political history of the Chagatai ulus, the state of Haidu and Mogulistan from their formation to collapse. The names of clans, tribes on the territory of these state formations have been established, their economy, as well as the socio-economic system, are described. Issues of ethnic history of the Kyrgyz people are presented. Designed for scientists, history teachers, ethnographers and everyone interested in the history of Central Asia.