Formation of the macro level of the RSFSR/USSR western border strip in the context of mobilization training

The formation of the Western Border Strip of the RSFSR/USSR in the context of Soviet spatial and territorial mobilization training is an urgent research problem that will help to understand contemporary processes in Russian border areas. The purpose of the article is to analyze the formation of the structure of the RSFSR/USSR Western Border Strip from 1918 to the 1920s within the land territorial borders from the Barents Sea to the Black Sea. The article for the first time shows the dynamics of changes in the administrative and territorial contours of the macrolevel subjects of the RSFSR/USSR Western Border Strip through the interaction between military and civilian departments to develop decisions related to the mobilization preparation of the border. As a result, two stages of forming the macro-level contours of the RSFSR/USSR Western Border Strip were identified, and their specific features were described. The conclusion was made about the growing dynamics of the contour overlapping for the sectors of threatened zones, military districts and macro-level subjects of the USSR Western Border Strip in connection with the preparation of all-Union evacuation and mobilization plans.