On 10 May 1930 Uvarovsky District was transferred to Moscow Oblast. On 12 May of the same year Smolensk Okrug was renamed Yartsevo Okrug, and its seat was transferred to Yartsevo. On 1 August 1930 the okrugs were abolished, and the districts were subordinated directly to the oblast. Smolensk and Bryansk were made cities of the oblast significance.
