3rd Army Corps
Army corps stood up in Ukraine's 2025 corps reform around the 3rd Separate Assault Brigade as its core formation.
Broad area of activity
Eastern front corps sector; exact boundaries are not publicly asserted here.
Notable history
Stood up in 2025 in Ukraine's shift from brigade-centric command to army corps, built around the 3rd Separate Assault Brigade's command cadre, and among the first of the new corps to be publicly presented. Its composition is only partly public — member brigades carry graded subordination on their own records.
Strengths
Inherits the 3rd Assault Brigade's recruitment brand, training pipeline and staff culture; a purpose-built corps staff rather than an improvised grouping.
Limitations
A new structure with a short institutional track record; public information on composition and boundaries is partial and contested.
Subordinate & associated
- 3rd Separate Assault Brigade Formation
Related organisations
- KRAKEN 1654 Disputed relationship · as of 2026-07 · low confidence
What is disputed: the unit's current formal subordination. Later public reporting associates Kraken with the 3rd Army Corps, while this atlas carries it under the intelligence-linked grouping on the strength of its documented origin. Neither placement is asserted as current, and the unit is not reassigned until the relationship passes source review.
Lineage & institutional history
Campaigns
Campaigns naming this organisation as a participant. The campaign record owns the relationship and grades it; this list is computed.
- The eastern attritional campaign Opposing force · Since April 2022 · moderate confidence · as of 2026-06
Recorded as a formation the module publishes and that is consistently associated with the eastern axis in open reporting. No position is stated.
Assessed as of2026-07Last reviewed2026-07
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