1st Army Corps
Identification
This record most likely matches the Operational-Tactical Command Donetsk / 1st Army Corps, military unit 00100. ISW’s 2017 DNR order-of-battle identifies 1st Army Corps as unit 00100, and a Razumkov Center defense study describes the 1st Army Corps headquarters in Donetsk, with some offices in Makiivka. The open sources reviewed support city-level identification in Donetsk, but not a corroborated street-level HQ. ([understandingwar.org](https://understandingwar.org/wp-content/uploads/2018/09/ISW20Separatist20ORBAT20Holcomb202017_Final.pdf))
Subordinates
The two direct placemarks are consistent with known subordinate formations. ISW/Holcomb lists the 1st Separate Motor Rifle Brigade (08801) at Komsomolske and the 100th Separate Motor Rifle Brigade (08826) in Donetsk/Marinka/Oleksandrivka. ISW later identified the 110th Separate Guards Motorized Rifle Brigade as the former 100th Brigade of the 1st Army Corps, which reconciles the placemark label 110th with unit 08826. ([understandingwar.org](https://understandingwar.org/wp-content/uploads/2018/09/ISW20Separatist20ORBAT20Holcomb202017_Final.pdf))
Force structure
By April 23, 2023, ISW’s observed order of battle for the Donetsk axis included the 1st Slavic, 5th, 110th, 132nd, and 114th brigades, the 1454th self-propelled artillery regiment, the 23rd air-defense division, and Sparta/Somalia battalions under the 1st Donetsk Army Corps. That reporting indicates a real corps-level headquarters with organic fires, air defense, armor, assault, and special-purpose elements rather than a purely nominal militia staff. ([understandingwar.org](https://understandingwar.org/wp-content/uploads/2023/11/Russian20Offensive20Campaign20Assessment20April20232020232028compressed29_0.pdf))
Combat employment
ISW reported on October 12, 2023 that Russian command had committed the main forces of the 1st DNR Army Corps and major 8th Combined Arms Army elements to the Avdiivka-Donetsk City line. It specifically placed 1st Motorized Rifle Brigade attacks from Spartak toward southern Avdiivka/Sieverne, 5th Brigade attacks from Staromykhailivka toward Krasnohorivka, and 114th Brigade attacks on the northern approaches. On February 22-23 and March 16, 2024, ISW still placed the 1st Slavic Brigade near Sieverne and the 110th Brigade near Nevelske/Pervomaiske-Nevelske, showing continued employment immediately west and northwest of Donetsk. ([understandingwar.org](https://understandingwar.org/wp-content/uploads/2023/10/Oct201220Russian20Offensive20Campaign20Assessment20PDF.docx__0.pdf))
Status
The hierarchy label 1st Army Corps is best treated as a legacy or transitional designation after 2023. Russia’s Defense Ministry stated that the 1st Donetsk Army Corps was fully incorporated into the Russian Armed Forces on January 1, 2023, and TASS reported that the Southern Military District formally expanded its area of responsibility to include Donetsk and Luhansk. ISW then assessed on August 31, 2024 that the 1st DNR Army Corps had been reorganized into the 51st Combined Arms Army, and 2025 ISW reporting described the 1st and 110th brigades as 51st CAA units formerly belonging to the 1st DNR Army Corps. For database purposes, this location is therefore most plausibly the Donetsk command node of the former 1st Army Corps, even though the formal designation appears to have changed after 2024. ([tass.com](https://tass.com/defense/1578531))