11th Mechanized Corps (Soviet Union)

By March of that year the brigades were based in Tsarskoye Selo, Slutsk, and Stary Peterhof, while the corps headquarters and rear units were still in Leningrad.

On 1 August, the 33rd Rifle and Machine Gun Brigade was transferred to the newly formed 7th Mechanized Corps.

The 31st Brigade stayed in the Leningrad Military District and became part of the 7th Mechanized Corps.

In February 1936, Chaykovsky was replaced by district deputy commander Komdiv Yakov Davidovsky.

After the signing of a Soviet-Mongolian mutual assistance treaty, units of the corps were deployed to Mongolia in March.

[3] The corps was ordered to counterattack German troops from the 8th Infantry Division advancing near Grodno.

[4] On the next day, the 6th and 11th Corps were ordered to retreat east towards Slonim to prevent German forces from cutting the Minsk-Warsaw Highway.

[5] Mostovenko was able to restore order and organized the corps into several combat groups by gathering remaining fuel and vehicles.

The corps retreated east near Vawkavysk through the forest, running into the German 29th Infantry Division at Zelva and losing several tanks.

Crossing the Shchara River on 27 June, the corps ran into German positions at Klepachi and Ozernitsa.

On 28 June, Mostovenko held a meeting with his subordinates, ordering a retreat in small groups through Novogrudok, Korelichi, and Mir.