Documents from Russian archives about the political situation in Trans-Baikal borderlands in the beginning of XX century

In article on the basis of a wide range of archival sources shows the situation on the Eastern outskirts of the Russian Empire in the beginning of XX century the paper presents the documents of three archives: the Russian state historical archive, Russian state military historical arhivai State archive of the Transbaikal territory. They deposited material on the political situation in the TRANS-Baikal region on the eve of the 1917 revolution, about the revolutionary movement in the region. Save memoirs of contemporaries of those events.Using these documents it is possible to recreate an objective picture of the events. The article shows the value introduced into scientific circulation of archival documents for further study of the revolutionary process, for example, Zabaykalsky transgenica.