Winter warfare redefined: drones erase seasonal lull in Ukraine conflict

Two Russian soldiers trudged through knee-deep snow at dawn, separated by the length of a car. The first tried to quicken his pace. The second kept falling, losing his rifle, getting stuck. Ukrainian officers watched every step and stumble in real time through a hovering drone's camera feed, displayed across screens in their command post. At 7:09 a.m., the soldiers were spotted. Fifteen minutes later, they were dead.

This small, brutal scene from Dnipro captures something fundamental about how winter has stopped being winter in Ukraine's war. For the first two years of fighting, which began in February 2022, heavy tanks and armored vehicles dominated the battlefield. When deep frost hardened the ground, they could move. But snow and mud slowed everything down. Winter meant a seasonal pause—a rhythm as old as warfare itself.

That rhythm is gone. Drones have erased it.

Russia now sends small groups of soldiers on foot or motorcycles, hoping to slip past Ukrainian lines undetected. For these units, the mission stays roughly the same whether it's July or January. The pace of fighting remains slow and grinding year-round. "Nothing really changes, summer or winter," said a Ukrainian platoon commander using the call sign Salo. "The only difference is the cold."

But cold matters now in ways it never did before. Winter conditions have become "exponentially more important" in drone-dominated warfare, according to Franz-Stefan Gady, a military analyst based in Vienna. Bare trees no longer hide troops from above. Snow tracks are visible from the sky. Lower temperatures make thermal cameras on drones more effective. A drone operator with the call sign Shirley explained how fresh snow made his job easier: "We can clearly see the tracks in the snow, where they lead, and identify positions where the enemy is hiding." Yet heavy snowfall brings the opposite problem. "When the snow intensifies, we lose visibility," he said. "For us, that's the most dangerous moment."

Russian forces exploit those moments. Bad weather, fog, heavy snow—these become cover for infiltration attempts. Rob Lee, a military expert at the Foreign Policy Research Institute in Philadelphia, noted that "a higher percentage will get through the front line when the weather is bad."

Extreme cold cuts both ways. It makes soldiers slower, reduces their combat capacity, keeps them exposed. But it also damages drones. Low temperatures drain batteries faster. Snow can render some models inoperative. A drone sergeant called Sol, sitting in a small apartment decorated with drones and toy cars, described the problem plainly: "Climate and technology are not friends." His team tried heating drones near gas stoves. They tested expensive anti-ice sprays. What worked best, he found, was rubbing meat fat on the propellers—a simple protective layer.

When first-person view drones and smaller models can't fly, Ukrainian forces shift to larger bomber drones called Vampiros. A platoon sergeant with the call sign Black said his teams had far less work in summer. "Now we fly 24 hours," he said, loading a truck with supplies while cartoonishly large snowflakes fell around him. The ice forced the truck to move slowly, making it an easy target for Russian drones.

Twenty-four kilometers from the front line, a field medic named Daryna worked in a small hospital. Beds had electric heaters. Two stretchers were ready with silver thermal blankets. That day, no patients arrived. Snow made it dangerous to evacuate the wounded without being attacked by drones. Daryna had noticed the delay growing worse. "A year ago, we received men wounded two or three hours earlier," she said, asking that her last name not be published for security reasons. "Now we receive men wounded a week ago." Delayed treatment means more deaths. Soldiers also dig deeper trenches now because of drone threats, which is harder when the ground is frozen. "The human factor still has to be present," Daryna said, "because infantry holds the line."

Military analysts remain uncertain whether Russia or Ukraine benefits more from winter. Much depends on how cold and how snowy it gets. Gady noted a paradox: "Both sides depend on unmanned systems for situational awareness and precision strikes, but both face limited operational windows." Still, winter traditionally favors defenders. Ukrainian troops need only hold their positions and stay put, limiting exposure. Russian forces must advance, moving through open ground. Black, clapping his hands to stay warm, summed it up: "Winter—you just have to endure it and wait for it to pass."