4th Eastern Siberian Corps

The 4th Eastern Siberian Corps (Russian: 4-й Восточно-Сибирский корпус) was formed in September 1918. On the orders of the Major General P. P. Ivanov-Rinov, the commander of the Siberian Army, on 17 September 1918, A. V. Ellerts-Usov, the commander of the Irkutsk military district, took over the corps. The Corps was one of the main formations of the Siberian Army during the Russian Civil War.

4th Eastern Siberian Corps
Country	Russia
Allegiance	White movement
Branch	Siberian Army
Size	Corps
Engagements	Russian Civil War
Commanders
Commander	Alexander Ellerz-Usov

It was commanded by Alexander Ellerz-Usov and had its headquarters in Irkutsk.

It was planned to include the 3^rd and 8^th Siberian rifle divisions in the corps, with the territories of the Irkutsk province and the Trans-Baikal region (with the exception of its Cossack population) were allocated for manning. Colonel I.V. Tonkikh was appointed chief of staff of the corps, Colonel N.V. Glavatsky, chief quartermaster, and Colonel N. Petukhov, artillery inspector.

By early December, there were 19,150 people in the 4^th East Siberian Corps:

• the 9^th (formerly 8^th) Siberian Division (Trans-Baikal Region) with 3 artillery divizions (8,150 soldiers),
• the 3^rd Siberian Personnel Division (Irkutsk Province) with 4 artillery divizions (8,350 soldiers),
• 8^th Siberian division (Yenisei province) (1,500 soldiers),
• 4^th Irkutsk mounted brigade (Irkutsk and Krasnoyarsk) - 800 people.

On 18 December 1918 A.V. Kolchak ordered the abolition of the corps areas of the Siberian Army and form military districts instead. The East Siberian Corps became the Central Siberian Military District, and from 16 January 1919 - the Irkutsk Military District. By order of A.V. Kolchak of January 3, 1919, the headquarters of the 4^th East Siberian Corps was abolished, and its parts went to replenish the 3^rd Irkutsk Siberian Rifle Division.