This book is devoted to the history of the Cossacks of the eastern regions of Russia (the Urals, Siberia, the Far East) in the post-reform period and at the beginning of the 20th century, on the eve of global social upheavals. Projects of reforms and their implementation in the Cossack regions in the 60-70s were analyzed. XIX century, changes in this regard, the military organization of the Cossacks, the management and land use system.