Unveiling the Strength of the 3rd Army Corps (Updated)

Updated July 7, 2025:

MilitaryLand was contacted by an official representative of the Kraken Detachment regarding our original story. We were informed that the recruiter on Reddit’s /r/ukraineforeignlegion did not have approval to share the details on which our article was based, and the recruiter deleted his post at Kraken’s request.

Additionally, we were told that while part of the unmanned component of the Kraken Detachment has requested to join the 3rd Army Corps, this move has not yet been approved by officials. The claim about the transfer of the entire Kraken Detachment to the 3rd Army Corps, shared by a second recruiter on the same subreddit, has been debunked by Kraken’s official representative.

Both posts have since been deleted. We have honored Kraken’s request and removed the section about them from our original story. We thank the Kraken Detachment for keeping us informed.

Original story:

Finally, after many months, we have our first confirmation on some information regarding the 3rd Army Corps, one of the newly formed corps, dating back to March 2025, and was formed on the basis of the 3rd Assault Brigade. There is a lot of information to unpack, and it comes from a recruiter responsible for foreign volunteers in the brigade on the Ukrainian Foreign Legion subreddit, which is used as a way to find more information about joining and is also used as an unofficial recruitment platform.

60th Mechanized Brigade enters the corps

The 60th Mechanized Brigade of the Ground Forces has been reassigned from the 11th Army Corps to the 3rd Army Corps. This follows speculations due to its proximity to the 3rd Assault Brigade on the frontline in the Luhansk direction. The brigade includes the 97th Mechanized Battalion, which was formed on the basis of the Azov-Kharkiv in 2023, and is closely aligned with Kraken.

A few more brigades are reportedly being placed under the command of the 3rd Army Corps, although this has yet to be officially announced.

New Units are being formed

Several support units have been created or elevated to the corps level. A dedicated Unmanned Systems Regiment has also been formed within the Corps, being discovered in March 2025. The regiment was formed on the basis of the Unmanned Systems Battalion as part of the 3rd Assault Brigade, having immense experience with many drones. The brigade has also used its influence to scale up the use of the Killhouse Drone Academy to help train and improve drone pilots. A separate Technical Intelligence Unit is also being established, most probably at a company or battalion scale, focused on the use of drones, electronic warfare, and enemy surveillance and detection.

The brigade’s medical service was also scaled up to a corps-level unit earlier in May 2025, and as of mid-June 2025, according to the recruitment platform LobbyX, it was reformed and established as the 4th Separate Medical Battalion, confirming that each corps will likely contain a separate medical battalion. In addition, a new Anti-Aircraft Missile Regiment named “Aquila” has been identified within the corps. Like the medical battalion, the Anti-Aircraft Missile Division belonging to the 3rd Assault Brigade was elevated into a corps-level unit, now becoming a regiment, once again confirming that each corps will likely contain a separate Anti-Aircraft Missile Regiment.

The reconnaissance battalion of the brigade has been established as a separate unit within the corps. The unit retains its structure and includes units such as Tempest Group, a foreign formation that had been founded by former members of Chosen Company.

The commander of the 3rd Assault Brigade’s Engineering Support Group announced on his personal Telegram channel that he was concluding his military service in the group and would soon begin a recruitment campaign for a new engineering unit that would be subordinated to the 3rd Army Corps. We can also confirm the establishment of a new communications unit, the 122nd Communications Battalion. Little information is known about this unit, but judging by the trend of many of these new corps-level support units, it was likely built on the basis of the Signals Company of the 3rd Assault Brigade.

The Corps is estimated to have a strength of around 50,000 personnel, with the 3rd Assault Brigade itself reportedly numbering over 10,000, based on details provided by a recruiter responsible for international volunteers joining the brigade.