Iran conflict exposes Europe's air defence gaps and costs

Air defence under scrutiny

The recent conflict involving Iran has laid bare the vulnerabilities and exorbitant costs associated with modern air defence systems. A new analysis by Bruegel, the Brussels-based think tank, examines how these failures are reshaping strategic calculations not just in the Middle East but across Europe. The findings are sobering for defence planners who have long assumed that layered air defences could neutralise most aerial threats.

According to the report, the performance of air defence systems during the Iran conflict fell short of expectations. Interception rates, while not officially disclosed in full, were inconsistent, and the sheer volume of incoming projectiles overwhelmed some batteries. This has raised urgent questions about the reliability of systems that European nations have invested heavily in over the past decade.

The price of protection

Cost is a central theme of the Bruegel analysis. Maintaining a credible air defence umbrella is not cheap—each interceptor missile can cost millions of dollars, and the radar and command infrastructure required to coordinate them adds billions to national budgets. For European countries already grappling with post-pandemic fiscal constraints and the financial strain of supporting Ukraine, these costs are becoming politically untenable.

Bruegel notes that the Iran conflict demonstrated a stark asymmetry: attackers can launch relatively inexpensive drones and missiles, while defenders must expend far costlier munitions to shoot them down. This economic imbalance, the report argues, is unsustainable for any prolonged engagement. European defence ministries are now wrestling with how to square this reality with their commitments to bolster collective security.

Lessons for European defence

The implications for Europe are profound. The conflict has underscored that no single nation can afford to build a foolproof shield alone. The report calls for deeper integration of European air defence assets, pooling resources to create a more resilient and cost-effective network. It also suggests that Europe must invest more heavily in counter-drone technologies and electronic warfare, which can neutralise threats at a fraction of the cost of traditional interceptors.

There is also a pressing need for stockpile transparency and joint procurement. Many European nations have depleted their munitions reserves through donations to Ukraine, and replenishing them at current prices is a slow, expensive process. Bruegel warns that without coordinated action, Europe risks entering the next decade with obsolete systems and hollowed-out arsenals.

Reassessing threat perceptions

The Iran conflict has also forced a rethink of threat assessments. For years, the primary aerial threat to Europe was considered to be Russian cruise missiles or aircraft. But the conflict has shown that lower-tech, high-volume attacks can be equally destabilising. Swarms of drones, some no larger than a small aircraft, have proven difficult to track and engage, especially in complex terrain or urban settings.

European air defence networks, designed primarily for Cold War-era scenarios, are not optimally configured for these new challenges. The Bruegel report recommends investing in advanced sensors and artificial intelligence to improve threat detection and prioritisation. It also suggests that European nations should consider more distributed basing of air defence systems, making them less vulnerable to a single catastrophic strike.

What lies ahead

As European leaders digest the Bruegel findings, the debate over defence spending is likely to intensify. The upcoming NATO summit and the European Defence Fund's next budget cycle will be key forums where these lessons are translated into policy. Expect to see renewed pressure on member states to increase their defence outlays, but also a push for smarter, more collaborative investments that avoid duplicating expensive capabilities.

The Iran conflict may be over, but its reverberations are just beginning to be felt in European chancelleries. The question now is whether the continent can adapt quickly enough to close the gaps that this conflict so clearly exposed. Watch for concrete proposals on joint air defence procurement and a possible reallocation of funds toward counter-drone and electronic warfare programmes in the coming months.