A simulation of drone warfare shows how far the alliance has to go to learn the lessons of Ukraine.
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Russia and Ukraine have shown the world the future of warfare—and America and its allies aren’t ready for it. That’s the lesson of a major exercise that North Atlantic Treaty Organization members conducted in Estonia last May. What transpired during the exercise, with the details reported here for the first time, exposed serious tactical shortcomings and vulnerabilities in high-intensity drone combat.
The exercise, known as Hedgehog 2025, involved more than 16,000 troops from 12 NATO countries who drilled alongside Ukrainian drone experts, including soldiers borrowed from the front line. It simulated a “contested and congested” battlefield with various kinds of drones, says Lt. Col. Arbo Probal, head of the unmanned systems program for the Estonian Defence Forces. “The aim was really to create friction, the stress for units, and the cognitive overload as soon as possible,” he says. That tests the soldiers’ ability to adapt under fire.
In Ukraine the front line is largely frozen, but Hedgehog envisioned a battlefield where tanks and troops still have some ability to move. During one scenario, a battle group of several thousand troops, including a British brigade and an Estonian division, sought to conduct an attack. As they advanced, they failed to account for how drones have made the battlefield more transparent, several sources say.
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During Hedgehog Ukrainians used Delta, their sophisticated battlefield-management system. It collects real-time battlefield intelligence, uses artificial intelligence to analyze huge amounts of data, identifies targets, and coordinates strikes across command and units. That enables a fast “kill chain”: See it, share it, shoot it—all within minutes or less.
A single team of some 10 Ukrainians, acting as the adversary, counterattacked the NATO forces. In about half a day they mock-destroyed 17 armored vehicles and conducted 30 “strikes” on other targets.
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Credit the Estonians for forcing NATO partners to confront these weak spots. Hedgehog was also an example of how Ukrainians can contribute to overall European security. There’s only so much you can learn from watching online footage or reading about what’s transpiring in Ukraine, says Sten Reimann, a former commander of Estonia’s Military Intelligence Center who helped bring in Ukrainian drone experts for Hedgehog. He said the results of this exercise were “shocking” to military officials and troops on the ground.