In the forests north of Lyman in Donetsk region, Ukraine's Third Army Corps is fighting one of the war's most unusual offensives. Under an operation named after Vivaldi's Four Seasons, heavy bomber drones have been air-dropping kamikaze ground robots more than 10 kilometres behind Russian lines — a tactic the corps describes as a world first. The corps says the operation has retaken more than 125 square kilometres of occupied territory, and officials cited in the New York Post put the Russian toll at about 3,000 troops since the effort began in May.
Robots in the Russian rear
According to the Third Army Corps, the air-drop tactic was unveiled during the second phase of Operation Vivaldi, announced around September 20. Heavy bomber drones flown by the Third Assault Brigade carried explosive-laden unmanned ground vehicles over the front line and released them deep in the Russian rear, allowing the machines to drive the final distance to their targets instead of crossing kilometres of contested ground.
The corps says its units have completed more than 15,700 missions with robotic systems, striking Russian command posts, shelters, logistics hubs and river crossings. "Wars are won by infantry, but we protect our infantry, which is why the robots go to the enemy first," the corps said in a statement carried by Ukrainian media. Its commander, Brigadier General Andrii Biletskyi, has argued from the start of the operation that machines belong in front of soldiers: "The enemy expects the threat from the sky, not the ground."
125 square kilometres retaken
Operation Vivaldi is a phased counteroffensive north and northwest of Lyman, the rail hub Russia has fought for years to hold. The corps says it has so far retaken more than 125 square kilometres, announcing in recent days the recapture of the villages of Shandryholove and Derylove and full control of Drobysheve. Officials cited by the New York Post say five villages and three settlements have been returned to Ukrainian control.
The claims could not be independently verified, and the corps' assertion that it is the first force in the world to deploy ground robots by air likewise cannot be confirmed from publicly available information. But the steady stream of footage released by the corps alongside its updates — including video of the air-drops themselves — suggests the push around Lyman is real and ongoing.
The sappers who never sleep
Perhaps the most striking detail is not the fighting but the clearing. In the Shandryholove sector, robotic ground vehicles cleared roughly 30 kilometres of mined routes across two nights — work the corps says would have taken two sapper companies about a week, at the risk of casualties. No Ukrainian sappers were hurt.
The corps says robotic systems now neutralise about 60 percent of the anti-personnel mines in its area of responsibility, while other unmanned platforms are laying mines of their own on Russian supply routes and evacuating wounded soldiers from the front.
A technological answer to Russia's manpower
Operation Vivaldi is Ukraine's answer to a brutal arithmetic problem: Russia can replace soldiers faster than Ukraine can. By putting machines first — in the air, on the ground, and now dropped from one into the other — Kyiv is trying to make every kilometre cost Moscow men it cannot easily replace, while sparing its own infantry. Whether robots can hold ground as well as they take it remains the open question. But in the woods north of Lyman, the experiment is already redrawing what an offensive looks like.