The monograph addresses the problems of the ethnic and sociocultural history of the Buryat people: the resettlement of Buryat tribes, the annexation of Buryat lands to Russia, social and economic structure, the spread of Buddhism among the Buryats, etc. The facts that determined the processes of historical development of the Buryats are analyzed. The use of unique sources in German, the interpretation of historical events make the monograph in demand.