The article reveals the specifics of the educational process in pre-revolutionary cadet corps of the Dnieper Ukraine on the basis of historical materials. In particular, it explains the way of instilling resistant behaviour to future officers by means of accustoming, associated with organization, equanimity and moderation that are inherent in the character’s feature such as disciplined behavior. The author proves, that a decisive influence on the character of the cadet had the education and the environment in which the socialization takes place. Formation of discipline as fundamental for the military character traits in the cadet corps in Ukraine in the XIX – early XX century was carried out primarily through habituation, by which pupils fixed in their minds resistant behavior related with organization, concentration, endurance. Cadets’ life and work activity were organized in such a way that the discipline as a form of behavior received both external and internal motivation. It is emphasized that Ukrainian cadet corps participated in parades and military reviews. It was considered an honor for the young men and such measures had influential educational value because of the effort, time and persistence spent on training, received a convincing motivation, and discipline, as a sustainable form of behavior of cadets, acquired scientific character. After all, a military parade is not only a solemn and outwardly beautiful action, but it is also a demonstration of strength and power of the state, the level of training of its army. At the beginning of the XX century pupils of cadet corps which operated in Ukraine have put in a particularly difficult situation, because they, unlike other members of the imperial cadet corps, had to choose between faith, Motherland and Tsar. This choice is needed not just discipline, endurance, courage, but also a deep understanding of the dialectical sense of duty. However, it was Ukrainian cadets who observed not mechanical implementation of rules and regulations, but understanding what they are doing and for what.