The application "History of the Omsk Cossacks" will acquaint you with the glorious pages of the development of the vast expanses of Siberia by the Cossacks and servicemen. The construction of fortresses and fortifications, creating defensive lines on the border with the restless steppe peoples, the opening of schools, colleges and temples, military exploits and intense daily work. The application works in the mode of a quiz and an encyclopedia and can be used for additional studies of local history.