In less than a month, EU member states Poland, Romania, Estonia, and Denmark have experienced drone or aircraft incursions attributed to Russian provocations. The Copenhagen Airport incident involved two to three large drones, forcing a shutdown of operations for nearly four hours on September 22, 2025. Danish Prime Minister Mette Frederiksen called the attack the most serious on Danish critical infrastructure, indicating possible Russian involvement. The European Commission, reaffirming plans first unveiled by President Ursula von der Leyen, announced a coordinated drone defense system—the 'drone wall'—involving seven eastern flank EU countries plus Ukraine and now Denmark. The project will focus on both detection and intervention against drone threats and is supported by a €150 billion EU loan program to boost defense spending. NATO's Secretary General Mark Rutte stated it was too early to confirm responsibility but affirmed alliance readiness to defend all allied territory. Discussions on capabilities, gaps, and financing are scheduled with the European Commissioner for Defense to take place soon.

In less than a month, EU member states Poland, Romania, Estonia, and Denmark have experienced drone or aircraft incursions attributed to Russian provocations. The Copenhagen Airport incident involved two to three large drones, forcing a shutdown of operations for nearly four hours on September 22, 2025. Danish Prime Minister Mette Frederiksen called the attack the most serious on Danish critical infrastructure, indicating possible Russian involvement. The European Commission, reaffirming plans first unveiled by President Ursula von der Leyen, announced a coordinated drone defense system—the 'drone wall'—involving seven eastern flank EU countries plus Ukraine and now Denmark. The project will focus on both detection and intervention against drone threats and is supported by a €150 billion EU loan program to boost defense spending. NATO's Secretary General Mark Rutte stated it was too early to confirm responsibility but affirmed alliance readiness to defend all allied territory. Discussions on capabilities, gaps, and financing are scheduled with the European Commissioner for Defense to take place soon.