Full Breakdown
Operation Vivaldi: Ukraine’s Counteroffensive Near Lyman
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Core Event
On September 15, the Ukrainian 3rd Army Corps announced Operation Vivaldi, a targeted offensive north of Lyman in Donetsk Oblast. In its first “season,” the corps reported clearing 75 km² of Russian infiltration and liberating an additional 10 km², including Serednie. Ukrainian forces said the action forced the relocation of fuel depots to Voronezh and disrupted a supply pipeline.
Timeline
- June 1 2026 – 60th Mechanized Brigade trained with ground drones.
- June 10 2026 – Anti-drone netting repaired in Sloviansk after bombing.
- August 10 2026 – Darts combat drone prepared for an artillery attack.
- September 7 – Brig. Gen. Andrii Biletskyi filmed at Sviatohirsk Lavra, refuting a Russian capture claim.
- September 15 – Corps lifted its information blackout, confirming territorial gains.
Data & Statistics
- Territory cleared/liberated: 85 km² total.
- Russian personnel losses: ~1,500 (corps estimate).
- Equipment destroyed: >12,000 drones, hundreds of armored vehicles and artillery pieces.
- Electronic-warfare impact: >20,000 Russian drone missions disrupted.
Official Statements & Responses
Brig. Gen. Biletskyi described the operation as the first “season” of a multi-phase campaign, likening it to Vivaldi’s *Four Seasons* and noting “maximum information silence” for security.
The Institute for the Study of War (ISW) confirmed significant logistical disruption, noting that units of the 144th Motorized Rifle Division relocated support elements to Voronezh. ISW analysts said Russian mil-bloggers were beginning to acknowledge Ukrainian advances.
Verbatim Quotes
- “Ukrainian forces have effectively eliminated the Russian salient north of Lyman,” — Giorgi Revishvili, Russia Analyzed.
- “Our operation is called ‘Vivaldi.’ And Vivaldi, as everyone knows, has four seasons. This is only the first of them,” — Andriy Biletsky.
Conflicting Reports & Gaps
Open-source analysts differ on the reclaimed area. Ukrainian statements cite 85 km²; French OSINT analyst Clément Molin, using satellite imagery, estimates over 200 km² extending to the Zherebets River. No independent verification of the larger figure is available.
Why It Matters
The Lyman sector lies on the northern flank of Ukraine’s “Fortress Belt” of fortified cities. Reducing the Russian salient eases pressure on this belt and may delay Russian attempts to envelop the urban cluster. Disrupting logistics forces Russia to reroute supplies deeper into its territory, complicating frontline sustainment as winter approaches.
What’s Next
Biletskyi said further “seasons” of Operation Vivaldi are planned, though timelines remain undisclosed. The corps will keep targeting infiltration pockets and aim to expand the bridgehead toward the Chornyi Zherebets River while maintaining electronic-warfare dominance against Russian drones.