The Pugachev uprising of 1773–1775 began with a speech by the Yaik Cossacks and soon grew into a full-scale peasant war led by E.I. Pugacheva. The reason for the outbreak of unrest, which covered vast territories, was the miraculous announcement of the escaped “Tsar Peter Fedorovich.” The unrest began on September 17, 1773 from the Budarinsky outpost and continued until mid-1775, despite the military defeat of the Cossack army and the capture of Pugachev in September 1774. The uprising covered the lands of the Yaitsk army, the Orenburg region, the Urals, the Kama region, Bashkiria, part of Western Siberia, the Middle and Lower Volga region. During the unrest, the Cossacks were joined by Bashkirs, Tatars, Kazakhs, Chuvashs, Mokshans, Erzyans, Ural factory workers and numerous serf peasants of all provinces where hostilities took place. First published in 1895 and written on the basis of archival documents and memoirs of contemporaries, a book by a historian and bibliographer Alexander Ippolitovich Dmitriev-Mamonov (1847–1915) and in our time is of considerable interest to both historians and ordinary readers.