Zelensky Confirms Vivaldi Gains as Ukraine Warns of Russian Mobilization

Key points

• Zelensky reported that Ukrainian units killed or wounded 10,660 Russian soldiers across all active fronts this week, with every casualty verified by video.
• Operation Vivaldi, led by the 3rd Army Corps, has reclaimed 125 square kilometers of territory near Lyman, including the villages of Serednie, Shandryholove, and Derylove.
• Ukrainian intelligence indicates Russia plans to mobilize 300,000 troops in 2026 following its State Duma elections, despite President Putin’s denial of such plans.
• The 3rd Army Corps utilized ground-based robotic systems to create 400 meters of mine barriers during the operation, enhancing defensive capabilities.
• Zelensky called on China, India, and other non-Western powers to pressure Russia, noting that Russia launched over 2,200 drones and 1,650 guided aerial bombs at Ukraine this week.

Background

Operation Vivaldi began in May 2026 as a counteroffensive to disrupt Russian infiltration near Lyman. Previous coverage highlighted the use of electronic warfare and intermediate-range strikes to degrade Russian logistics. The operation has been described as a series of local successes rather than a single strategic collapse, with both sides massing forces for a fall-winter campaign in central Donbas.

How outlets are covering it

Kyiv Post and Ukrinform reported Zelensky’s announcement of 10,660 Russian casualties and the success of Operation Vivaldi. Ukrainian Pravda emphasized the lack of specific territorial details provided by Zelensky, noting only that designated objectives were achieved. The Modern War Institute analyzed Operation Vivaldi as a potential prelude to a broader operational breakthrough, highlighting the role of drone dominance and middle-strike campaigns in degrading Russian logistics. It noted that while Ukraine has achieved tactical success, it has not yet turned this into an operational-level victory by overrunning Russian rear areas. The institute also emphasized the need for Ukraine to mobilize its society and international partners to support a theory of victory, contrasting the current attritional approach with the need for a decisive breakthrough.

Why it matters

The gains in the Lyman axis demonstrate Ukraine’s ability to achieve tactical successes through technological innovation and strategic planning. However, the warning of a new Russian mobilization highlights the ongoing challenge of sustaining these gains against a larger adversary. The conflict’s intensity across multiple fronts underscores the need for continued international support and a clear strategy for achieving a decisive victory.

What to watch

Ukrainian forces are expected to continue operations in the Pokrovsk, Kostiantynivka, and Lyman axes, with further active steps to be determined by Zelensky and Commander-in-Chief Mykhailo Drapatyi. Russia’s potential mobilization of 300,000 troops could significantly alter the balance of power, requiring Ukraine to adapt its strategy and seek additional support from international partners.