Ukraine has revealed the details of a world-first combat tactic: heavy bomber drones airdropping kamikaze ground robots deep behind Russian lines. The Third Army Corps of the Armed Forces of Ukraine says the operation — part of the wider Operation Vivaldi offensive — has killed more than 3,000 Russian soldiers, completed over 15,700 missions, and helped return roughly 125 square kilometres of occupied territory to Ukrainian control.
“An historic moment,” the corps announced on Telegram this week. “The Third Army Corps has begun a new stage of the war with the landing of ground robots.”
A world-first tactic, delivered from the air
The operation began in May and was kept secret until this week. According to corps commander Brigadier General Andrii Biletskyi, heavy bomber drones carried the small four-wheeled unmanned ground vehicles — UGVs — and dropped them up to 10 kilometres behind the Russian front line, in what the corps describes as the first battlefield use of air-deployed ground robots anywhere in the world.
“The Third Army Corps was the first in the world to begin air-deploying ground robotic systems,” Biletskyi said. “Our heavy bomber drones deliver suicide ground drones more than 10 kilometres into the enemy’s rear.”
Cameras mounted on the robots captured the surprise strikes. The unit says artillery and unmanned systems struck enemy command posts, communications hubs, logistics lines, river crossings and reserves, while Ukrainian air defences and electronic warfare units built what Biletskyi called a protective dome over the combat area — blinding Russian reconnaissance drones so they could not read the plan.
“The enemy expects the threat from the sky, not the ground,” Biletskyi said. “Where the enemy least expected it, dead and wounded Russian soldiers appeared.”
125 square kilometres back under Ukrainian control
The corps reports that across the first two phases of Operation Vivaldi, it has brought 125 square kilometres back under Ukrainian control — roughly 48 square miles — including the liberation of Shandryholove and Derylove and the establishment of full control over Drobysheve. The second phase alone cleared about 40 square kilometres.
Around 800 of the more than 3,000 reported Russian casualties came in the latest phase of fighting. The corps says the operation has badly damaged the offensive capability of three major Russian formations at once: the 20th and 25th Combined Arms Armies and the 1st Guards Tank Army.
The Institute for the Study of War assessed on September 15 that Vivaldi had already achieved an operationally significant result, disrupting Russia’s effort to encircle the fortified belt of Donetsk cities — the defensive line anchoring Kyiv’s hold on the region. Biletskyi added that search-and-strike teams had eliminated Russian infiltration pockets in several areas, countering the small-group tactics Moscow has used to probe Ukrainian defences.
A glimpse of warfare’s future — and its limits
Military specialists call the delivery method “marsupial”: one unmanned system carrying and releasing another. The U.S. Army tested air-dropped ground robots repeatedly over three decades without ever fielding the capability; Ukraine has now done it in combat.
An officer from the unit that flew the missions, Viktor Pavlov of the Third Assault Brigade’s ground robotics battalion, offered a note of caution: the approach is constrained by the carrier drone’s payload capacity and the difficulty of landing a robot softly. For now, he said, it remains a targeted tool rather than a routine method — most useful for crossing obstacles a ground robot cannot manage on its own, such as rivers, swamps or dense forest.
The figures released by the corps have not been independently verified, and independent footage of the tactic being used at scale has not yet surfaced. But the concept’s combat debut marks a genuine milestone: the third dimension of drone warfare is no longer only in the air.
Biletskyi made clear the operation is far from over. “Our operation is called Vivaldi, and Vivaldi, as is well known, has four seasons, and this is only the first of them,” he said earlier. The corps now says two of the four planned phases are complete, and the momentum is gathering.