Zelensky Announces Fourth Phase of Operation Vivaldi After Reclaiming 176 Square Kilometers
President Volodymyr Zelensky visited the Lyman sector on September 30 to announce the launch of a fourth phase of Operation Vivaldi. Ukrainian forces have reclaimed 176 square kilometers of territory in Donetsk Oblast, inflicting over 5,000 casualties on Russian troops. The offensive, led by the Third Army Corps, utilized advanced drone and ground robot tactics to halt Russian advances toward the fortress belt.
Key points
- Zelensky confirmed the start of the fourth phase of Operation Vivaldi during a visit to the 66th Separate Mechanized Brigade.
- Ukrainian forces have reclaimed 176 square kilometers of territory, including villages such as Ridkodub, Nove, and Katerynivka.
- The operation has resulted in over 5,000 Russian casualties and the capture of 250 prisoners.
- Zelensky emphasized the critical role of ground robotic systems and long-range artillery in achieving these gains.
- The offensive has halted Russian attempts to break through the rear of the Sloviansk-Kramatorsk region.
Background
Operation Vivaldi began in May 2026 as a counteroffensive in the Lyman sector. Previous phases focused on reclaiming territory and disrupting Russian logistics through drone dominance and robotic demining. The operation has been described as a shift from attritional warfare to operational-level maneuver, though analysts note that achieving a decisive breakthrough remains a long-term challenge.
How outlets are covering it
The Kyiv Independent and Kyiv Post report on the official Ukrainian claims of success, highlighting the reclamation of 176 square kilometers and the announcement of a fourth phase. The Modern War Institute provides a deeper analysis, noting that while Operation Vivaldi demonstrated tactical success, it has not yet translated into an operational-level breakthrough. The institute emphasizes the need for Ukraine to achieve drone dominance and exploit the momentum to force a strategic shift in the war.
Why it matters
Operation Vivaldi represents a significant shift in Ukrainian military strategy, demonstrating the effectiveness of drone and robotic systems in countering Russian advances. The success of the operation could influence future military planning and international support for Ukraine, while also affecting the broader dynamics of the war in the Donbas region.
What to watch
Ukrainian forces are expected to continue the fourth phase of Operation Vivaldi, focusing on further territorial gains and the disruption of Russian logistics. The success of this phase will depend on the ability to maintain drone dominance and exploit any openings in Russian defenses. International observers will closely monitor the operation's progress and its impact on the broader war effort.
- Zelensky visits Lyman sector, says Operation Vivaldi reclaimed 125 square kilometers The Kyiv Independent
- Russian Offensive Campaign Assessment, September 28, 2026 Critical Threats
- Ukraine Plans 4th Phase of Operation Vivaldi After Retaking 176 Square Km, Inflicting 5,000 Russian Losses Kyiv Post
- Zelenskiy says he visits military command post near Ukraine's eastern frontline Reuters
- An Overture to Victory: Operation Vivaldi and Ukraine’s Path to Battlefield Decision Modern War Institute -
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