European defence unity: Can the EU finally speak with one voice?

European defence has rarely felt so urgent. With Russia’s war in Ukraine grinding past the two-year mark and NATO allies openly questioning Washington’s long-term commitment to the continent, the European Union is making its boldest push yet to forge a common military identity — and the debate is getting loud.

A continent rethinking its security

For decades, European defence was a polite fiction. Member states jealously guarded their military sovereignty, pooled almost nothing, and quietly relied on the United States to do the heavy lifting through NATO. But that arrangement is under serious strain. Since 2022, EU countries have pledged over €150 billion in combined military aid and domestic rearmament budgets, a figure that would have seemed absurd just five years ago.

Still, pledges and actual coordination are two very different things.

The integration debate splits capitals

Inside Brussels, the conversation has shifted from whether Europe should deepen defence cooperation to how fast and how far. The European Defence Fund, which now runs at roughly €8 billion for the 2021–2027 budget cycle, is seen as a start — but critics say it’s a drop in the ocean compared to what genuine strategic autonomy would require.

France has long championed an autonomous European military capacity, sometimes to the irritation of eastern flank members like Poland and the Baltic states, who worry that any move away from NATO’s American umbrella makes them more vulnerable, not less. Germany, after years of chronic underinvestment, announced its €100 billion special defence fund in 2022 and has since been scrambling to rebuild credibility as a serious military partner.

“We are at a turning point,” said a senior EU official who spoke on condition of anonymity. “The question is no longer whether we need European defence — it’s whether we have the political courage to actually build it.”

Where the stumbling blocks lie

Unanimity rules in foreign and security policy remain the single biggest structural headache. Any one of the 27 member states can effectively veto a common position. Hungary has used that leverage repeatedly. And defence procurement is still wildly fragmented — the EU operates something like 178 different weapons systems, compared to around 30 in the United States.

That redundancy costs money and erodes interoperability. Two soldiers from different EU countries can struggle to communicate or share ammunition in the field. It’s not a theoretical problem.

What comes next

The European Commission is pushing hard for a Defence Industrial Strategy that would incentivise joint procurement and reward countries that buy European rather than American or Israeli equipment. A white paper published in March 2024 laid out the framework, and member states are expected to respond with concrete commitments before year’s end.

Whether that translates into genuine unity or another round of well-worded declarations remains the central question. Europe has a habit of finding consensus on paper and fragmentation in practice. But the pressure is different now. And the clock, for perhaps the first time, feels genuinely real.