Belorussian Special Military District

The Byelorussian Military District (alternative spelling Belorussian) was a military district of the Soviet Armed Forces. Originally in the times of Russian Civil War it formed as the Western Front, and in April 1924 it was renamed to the Western Military District. In October 1926 it was redesignated the Belorussian Military District, with its staff in Smolensk. And in July 1940 it was renamed the Western Special Military District. It covered the territory of the Byelorussian SSR and the western part of the RSFSR (including Smolensk area, Bryansk area, and parts of Kaluga area).

In 1928, the first maneuvers of troops of the district were held, which was attended by 6th Cavalry Division and 7th Cavalry Division, 5th, 8th and 27th Rifle Divisions, 33rd territorial division, a tank brigade of the Moscow Military District, artillery, aviation, communication, and engineering units. The exercises showed growth in the combat skills of troops, which attended the People's Commissar for Military and Naval Affairs, Kliment Voroshilov.

In 1932 it deployed from within the country the 4th Leningrad Cavalry Order of the Red Banner Voroshilov Division commanded by Georgy Zhukov. In 1932-1933, in connection with the development of armored vehicles, it formed seven separate tank brigades, armed with Soviet-made tanks: light T-24, T-26, medium T-28, fast BT-2, BT-5, floating T-37, heavy T-35, T-27 tankettes. In 1937 the district deployed 15 infantry divisions, grouped into five infantry corps and five cavalry divisions.

...
Wikipedia