Ukraine’s Reported Vivaldi Offensive Puts Russian Positions Under Pressure in the Donbas

A new account of the reported fourth phase of Ukraine’s Vivaldi Offensive describes major Ukrainian operations along the Donbas front, particularly around the Lyman sector. The Ukrainian 3rd Army Corps allegedly reclaimed 277 square kilometers and 16 settlements after attacking entrenched Russian defensive positions. The territorial gains, casualty figures, and claimed 10-to-1 casualty ratio have not been independently verified.

The report also describes extensive drone operations, claiming that Ukrainian forces conducted approximately 36,000 strikes against Russian troops and supply routes. It alleges that these attacks disrupted logistics and forced specialized Russian units, including the Rubikon UAV battalion, to withdraw from some frontline positions.

Another reported development involves the use of unmanned ground vehicles (UGVs), including claims that kamikaze systems were delivered behind enemy lines by an aerial deployment method. The account further alleges significant losses among Russian commanders and personnel, contributing to pressure on the northern Lyman salient.

The reported advances may also have forced Moscow to consider redeploying elements of the 1st Guards Tank Army from the Kupiansk direction to reinforce threatened positions. If confirmed, these developments would highlight the growing importance of drones, robotic systems, and logistics disruption in Ukraine’s evolving battlefield strategy. However, claims of a complete Russian frontline collapse or an irreversible military defeat remain unverified.