The 233rd Rifle Division was an infantry division of the Red Army, originally formed in the months just before the start of the German invasion, based on the shtat of September 13, 1939. As part of 20th Army it was moved from the Moscow Military District to the front west of Orsha by July 2. Serving under Western Front the 20th was soon pocketed in the Smolensk region and although remnants of the 233rd were able to escape the division was no longer combat-effective and was broken up for replacements in early August.

The 229th Rifle Division was an infantry division of the Red Army, originally formed in the months just before the start of the German invasion, based on the shtat of September 13, 1939. As part of 20th Army it was moved from the Moscow Military District to the front west of Orsha by July 2. Serving under the Western Front the 20th was soon pocketed in the Smolensk region but the 229th was able to escape at the cost of significant losses. It was partially rebuilt before the start of the final German offensive on Moscow, when it was completely encircled and destroyed.