NATO's Struggles with Drone Warfare: Lessons from Hedgehog 2025

A recent NATO exercise, Hedgehog 2025, conducted in Estonia, has revealed significant vulnerabilities in the alliance's preparedness for modern drone warfare, particularly as exemplified by Ukraine's combat experience. The exercise, which took place from May 5 to 23, 2025, involved over 16,000 troops from 12 NATO countries simulating a Russian invasion scenario. Ukrainian drone operators, acting as the adversary, effectively neutralized two NATO battalions, destroying 17 armored vehicles and conducting 30 strikes within half a day.

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The exercise highlighted the dramatic shift in battlefield dynamics due to the prevalence of drones. Ukrainian forces have adapted to a combat environment characterized by persistent aerial surveillance and rapid strike capabilities, utilizing systems like the Delta, which integrates drone feeds, satellite data, and frontline intelligence. This allows for a compressed kill chain, enabling detection and strike within minutes. In contrast, NATO forces were criticized for relying on outdated tactics and slower coordination mechanisms, failing to adapt to the realities of drone warfare.

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Ukraine has significantly scaled its drone production, with firms like Skyfall producing 100,000 bomber drones annually at a unit cost of $8,500. These bombers can conduct multiple sorties, dropping several grenades per mission, which makes them more cost-effective compared to single-use FPVs (first-person view drones). Ukrainian drone units have demonstrated a persistent edge in bomber drone capabilities, effectively utilizing advanced technology to conduct strikes and assess damage in real-time.

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The results of Hedgehog 2025 have drawn sharp criticism regarding NATO's readiness for contemporary warfare. Retired U.S. General David Petraeus emphasized that true lessons from such exercises require a fundamental rewrite of military doctrine, force structure, and training to reflect the new operational realities. Observers noted that NATO troops operated as if they were in a pre-drone era, with one participant describing the situation as “just walking around” without adequate concealment.

Estonian defense officials acknowledged the exercise's purpose was to confront vulnerabilities before a real conflict arises. They noted that the old tactics of large daytime convoys are no longer viable, and the overwhelming presence of drones made concealment nearly impossible. Danish Prime Minister Mette Frederiksen remarked on Ukraine's expertise in anti-drone capacities, reinforcing the notion that NATO must learn from Ukraine's experiences.

While the exercise demonstrated NATO's shortcomings, some sources indicated that the drone saturation experienced by Ukrainian forces in real combat conditions was not fully replicated during the exercise. There were discrepancies regarding the effectiveness of NATO's drone teams, with some reports suggesting that exercise umpires may have exaggerated the impact of drone strikes.

The findings from Hedgehog 2025 are expected to accelerate European drone procurement, particularly in the Baltic states. Initiatives like Estonia's "Angry Hedgehog" loitering munition program are likely to receive increased funding. However, challenges remain in training personnel and adapting military doctrine to effectively integrate drone warfare strategies.

• “We are f—.” — NATO Commander, reacting to the exercise outcomes.

• “The old maneuver tactics, moving in large daytime convoys, just aren’t viable on the battlefield anymore.” — Reserve Major Sten Reimann, Estonian Defense League.

• “But here’s the hard fact: 10 people with drones and a laptop running Delta eliminated more combat power in half a day than most NATO battalions could generate in a week of conventional operations.” — Security expert, reflecting on the exercise results.