Ukraine’s ‘Vivaldi’ Offensive Claims 125 km² Gain and 2,000 Russian Dead, Testing Moscow’s Lines
Ukraine’s 66th Mechanized Brigade says it helped retake more than 125 km² in Operation Vivaldi, as the 3rd Army Corps unit claims up to 2,000 Russian soldiers killed and 250 captured. The push near Lyman and Orikhiv signals a costly phase of the war where Ukraine is trading manpower and ammunition for modest but symbolically important ground.
Ukraine is leaning hard into a new offensive it calls Operation Vivaldi, claiming meaningful territorial gains and steep Russian losses as it pushes on multiple axes in the east and south. Kyiv is portraying the operation as proof that, even after years of brutal fighting, its forces can still claw back land and prisoners from deeply entrenched Russian units.
President Volodymyr Zelensky visited the command post of the 66th Mechanized Brigade, one of the units spearheading the campaign on the Lyman axis, and said the brigade had helped return more than 125 square kilometers of territory to Ukrainian control in cooperation with other elements of the 3rd Army Corps. That is a sizable pocket by the standards of this grinding war, where advances are often measured in fields and tree lines.
The 3rd Army Corps went further, claiming that its 20th Separate Unmanned Systems Brigade “K‑2” and other elements inflicted large losses on Russian forces during Operation Vivaldi, including around 2,000 Russian soldiers killed and 250 taken prisoner. Those figures, which cannot be independently verified from the available reporting, suggest intense combat and would mark one of the operation’s bloodier episodes if confirmed.
On the ground, the fighting stretches from the forests and villages near Lyman to the open fields around Orikhiv in Zaporizhzhia. Ukrainian forces have reportedly made advances south of Mala Tokmachka near Orikhiv, according to assessments cited from the Institute for the Study of War. Drone units are heavily engaged; Ukrainian sources describe remote‑mining missions against Russian logistical routes that leave supply vehicles destroyed and crews wounded as they attempt to move toward the front.
For Ukrainian soldiers, the cost of these gains is immediate. Video from the front shows Russian glide bombs landing dangerously close to their positions, and vehicles hitting mines laid by Ukrainian drones on Russian routes remind everyone that the “grey zone” behind the front lines can be as lethal as the trenches. Casualty numbers on the Ukrainian side were not included in the reports, but the description of “hell” at the front hints at the price being paid.
For Moscow, even modest Ukrainian advances deepen the strain on a force that outside intelligence services already describe as depleted. Denmark’s defence intelligence service estimates that Russia has suffered more than a million military casualties since the full‑scale invasion began and says Moscow is taking heavy losses for only marginal territorial gains. If Ukrainian claims about the toll during Operation Vivaldi are even partly accurate, they would fit that picture of an army trading bodies for ground.
Operationally, the offensive matters because it targets seams in Russia’s defensive network rather than the most fortified segments head‑on. Gains near Lyman threaten Russian lines that support operations deeper into Donetsk region, while movement south of Mala Tokmachka tests Russia’s ability to hold the land bridge to Crimea. Prisoners of war captured during these pushes also have intelligence value and may be used in future exchanges.
The broader pattern is of a war that refuses to settle into a frozen conflict. Both sides continue to launch significant ground operations even as drones and missiles pound rear areas, from thermal power plants in central Ukraine to depots and bases inside Russia’s own border regions. Each offensive like Vivaldi is less about one breakthrough than about exhausting the other side’s reserves.
In a conflict defined by attrition, 125 square kilometers and several hundred prisoners are a reminder that territory still carries political weight. Every village flagged as “liberated” offers Kyiv a counter‑narrative to Russian claims of irreversible annexation.
Key signals to watch next include independent satellite or Western intelligence confirmation of the recaptured area, any corroboration of Russian casualty and POW figures, how Moscow adjusts its defenses around Lyman and Orikhiv, and whether Ukraine can sustain the tempo of Vivaldi before ammunition, manpower or air defense gaps force it to slow down.
Sources
- OSINT