Прибалтийский военный округ
In 1939 the 11th Army (2nd formation) was formed in the Belarusian Special Military District (BSMD) from the former Minsk Army Group. It took part in the Soviet invasion of Poland (1939). In summer 1940 it became part of the Baltic Military District (from August, 17th, 1940 the Baltic Special military district).