| Deploying nation |  Ukraine |
|---|---|
| Host nation or area | Ukraine |
| Region | Eastern Europe |
| Military branch | 🪖 Ground forces |
| Record type | Troop or force movement |
| Operation or mission | |
| Unit or formation | Not publicly confirmed |
| Personnel | At least 277 sq km liberated, per ISW Confirmed figure |
| Equipment | Not stated |
| Status | Confirmed active |
| Start or report date | Oct 21, 2026 |
| Withdrawal or end date | — |
| Last verified | Oct 21, 2026 |
| Confidence | Medium: one credible outlet |
Background
Operation Vivaldi counteroffensive forcesISW assesses the operation defeated the northern pincer of a planned Russian encirclement. Route: Lyman direction → Donetsk region. Status: As assessed by ISW.
Deployment timeline
- Record added from The Boston Report Military Deployments Tracker. Source report dated 2026-10-21.
Sources
Related deployments
- Russia: Elements of the 120th Naval Infantry Division, 40th Separate Naval Infantry Brigade and 90th Tank Division to Oleksandrivka direction, Ukraine, to defend against Ukrainian counterattacks Confirmed active
- Germany: 4th Logistics Regiment convoys (Brave Blue 26 exercise) to Estonia Confirmed active
- Russia: Elements of the 41st Combined Arms Army to Toward Serhiivka, southwest of Dobropillya, Ukraine Confirmed active
- Russia: 5th Tank Brigade, 37th and 64th Motorized Rifle Brigades to Hulyaipole direction, Zaporizhzhia region, Ukraine Confirmed active
- Sweden: Patriot air-defense unit to Poland Announced or pending
- U.S. troops in Poland Confirmed active
- Turkish Task Group Command in Azerbaijan Confirmed active
- North Korea: about 11,000 troops (about 10,000 combat, 1,000 engineers) Confirmed active
Public information only. Locations are given at country or sea-area level. Figures are shown as the source reported them; estimates and claims are labeled. Spot an error? Request a correction.