Abstract: The subject of the study is various aspects of the formation of the personnel of the police of Mordovia, determined by the regulatory framework at all levels. The object of the study includes factors determining the nature of the formation and functioning of the militia, considered taking into account regional peculiarities. The work is aimed at highlighting the political situation, historical moments that influenced the organizational and legal foundations of the militia, as well as at outlining the essence of the processes that had a direct impact on the training of law enforcement officers and the reorganization of the workers' and peasants' militia in the 1930s. It is possible to distinguish all-Russian, local conditions, national features of historical development. Conclusions:1. In the 1930s, the militia of Mordovia continued to be formed as an integral part of the unified state mechanism, in accordance with the tasks, functions and operational situation of that time. 2. An important role was assigned to the development and adoption of regulatory legal acts and job descriptions, on the basis of which significant changes were made to the procedure for recruitment, training and service by the police personnel of the region. 3. These processes were carried out in the conditions of the folding of the command and administrative system, the class approach used in the selection of employees, placement and training of personnel, as well as the strengthening of totalitarianism. 4. The reorganization of the police of Mordovia and the training of personnel were influenced by abrupt changes in the socio-economic and political course of the country, as well as the peculiarities of their development in Mordovia. 5. Endless innovations and measures to reorganize the police apparatus in connection with the "second birth" of the Mordovian militia also did not contribute to improving the efficiency of its activities. 6. The development of the regional militia was influenced by the situation prevailing in the country as a whole. That is, the development of the organizational and legal foundations of the activities of the Mordovian militia has features that were characteristic of the police apparatus of the country as a whole.