# Ukraine’s Operation Vivaldi Regains 176 km² and 250 POWs, Kyiv Says, Halting Push Toward Sloviansk–Kramatorsk

*Wednesday, September 30, 2026 at 8:07 PM UTC — Hamer Intelligence Services Desk*

**Published**: 2026-09-30T20:07:18.870Z (2h ago)
**Category**: conflict | **Region**: Eastern Europe
**Importance**: 9/10
**Sources**: OSINT
**Permalink**: https://hamerintel.com/data/articles/19266.md
**Source**: https://hamerintel.com/summaries

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**Deck**: President Volodymyr Zelensky says Operation Vivaldi clawed back 176 square kilometers and blocked a Russian move toward the Sloviansk–Kramatorsk rear, while Ukraine’s 3rd Army Corps reports 250 Russian prisoners taken in the fighting.

Ukraine is presenting Operation Vivaldi as a major success on the northeastern front, saying it recaptured ground and disrupted a Russian attempt to threaten a critical rear area.

President Volodymyr Zelensky said on 30 September that Ukrainian forces regained control of 176 km² during the operation and stopped a Russian attempt to break into the rear of the Sloviansk–Kramatorsk area. He put Russian losses at more than 5,000 killed and wounded, with another 250 troops captured.

Ukraine’s 3rd Army Corps released footage of what it said were Russian soldiers captured in the operation. The corps said 250 Russian troops were taken prisoner and claimed that entire units surrendered in some cases. According to the corps’ account, some prisoners said they had been forced to eat nettles and drink their own urine while trying to survive before their capture. Those claims come from Ukrainian military reporting; they have not been independently verified.

New battlefield details are also emerging from individual units. Bogdan Korzhenko, commander of the 1st Assault Battalion of the 3rd Separate Assault Brigade, described the third phase of Vivaldi in an interview with Ukraine’s 24 Kanal. He said fighters from his battalion advanced on the main axis of attack under the cover of electronic warfare and air defense, riding on armored vehicles through active combat zones.

Ukrainian commentators frame these gains as strategically important rather than merely symbolic. By Kyiv’s account, Russian forces were trying to create a path toward the rear of Sloviansk and Kramatorsk, which anchor Ukraine’s defense in part of the Donbas. Regaining 176 km² in that context helps keep pressure away from supply lines and command hubs behind those cities.

Separate open-source mapping has described a broader Russian setback north of Sumy, noting that after months of fighting Russian troops failed to consolidate some positions and that Ukrainian forces fully recaptured localities such as Ivolzhanske and Kyyanytsya and reentered Nova Sich. That mapping did not explicitly link those actions to Operation Vivaldi, but taken together the reports suggest that Russian attempts to open new pressure points along Ukraine’s northern border have run into resistance.

The way Ukrainian units describe Vivaldi also points to evolving tactics. The emphasis on advancing under electronic-warfare cover and air defense, and moving assault troops on armored vehicles through live fire, reflects an effort to combine mobility with protection in dense drone and artillery environments.

If Ukrainian claims hold, an operation that shifts control of 176 km² and produces 250 prisoners changes the balance of forces in at least one sector and strengthens Kyiv’s case for continued outside support.

Key indicators in the coming weeks will be satellite and independent mapping that confirm the extent of the regained area, evidence that Ukraine is fortifying its new lines against counterattacks, and further corroboration of POW numbers and conditions from neutral monitors or prisoner exchanges.