European leaders have moved to reassure allies that the European Union’s expanding defence agenda is not designed to replace NATO, but to give Europe more weight, readiness and industrial capacity inside the existing transatlantic security architecture.
French President Emmanuel Macron and Greek Prime Minister Kyriakos Mitsotakis delivered that message during talks in Athens, where they renewed Franco-Greek defence cooperation and used the visit to frame Europe’s security debate around complementarity rather than institutional rivalry. Their comments came as EU governments accelerate discussions on military spending, joint procurement, defence production and the practical meaning of the EU treaty’s mutual-assistance clause.
Macron said Europe should not act in a way that weakens NATO, which remains the main collective-defence alliance connecting European states with the United States and Canada. Instead, he argued that Europeans are responding to a demand Washington has made for years: that Europe shoulder more responsibility for its own security, invest more in its armed forces and close capability gaps exposed by Russia’s war against Ukraine.
Mitsotakis made a similar point, saying that a stronger European defence effort should be understood as a reinforcement of NATO’s European pillar. For Greece, a frontline NATO and EU member in the eastern Mediterranean, the issue is not theoretical. Athens has long argued that Europe must be able to respond more credibly to regional crises, protect maritime routes and strengthen deterrence while remaining embedded in NATO’s planning and command structures.
The intervention is significant because the language of European strategic autonomy has often generated concern among Atlanticist governments that EU defence initiatives could duplicate NATO, fragment spending or create political ambiguity in a crisis. The latest remarks sought to narrow that gap. European autonomy, in this framing, means more deployable forces, more secure supply chains, more European-made equipment and faster decision-making — not a separate alliance.
The debate has become more urgent as European governments face multiple pressures at once. Russia’s full-scale invasion of Ukraine has forced a long-term reassessment of deterrence on the continent. The war has drained ammunition stocks, exposed dependence on non-European suppliers and pushed NATO allies to raise defence budgets. At the same time, uncertainty over the durability of US security guarantees has sharpened calls for Europe to prepare for scenarios in which Washington expects Europeans to carry a larger operational burden.
EU leaders have increasingly argued that NATO and the EU possess different but mutually reinforcing tools. NATO provides integrated military planning, collective-defence command structures and the Article 5 security guarantee. The EU, by contrast, can mobilise industrial policy, budget instruments, sanctions, internal-market regulation, research funding and cross-border procurement incentives. European officials say the challenge is to align those tools rather than force a choice between them.
Macron has long been one of the most prominent advocates of European strategic autonomy, a concept that has sometimes been interpreted as a French call for a more independent Europe, less reliant on Washington. In Athens, however, he placed the argument within NATO rather than outside it. He said the European push should be seen as a long-overdue answer to US calls for burden-sharing, not as a bid to detach Europe from the Atlantic alliance.
That formulation is intended to make the agenda more acceptable to countries in central, northern and eastern Europe, many of which see NATO and the US military presence as indispensable to their security. For states bordering Russia or close to the Baltic and Black Sea theatres, the immediate concern is not institutional autonomy but credible deterrence, air defence, ammunition production, rapid reinforcement and the continued presence of allied forces.
The Athens meeting also highlighted the role of bilateral defence pacts in Europe’s wider security architecture. France and Greece renewed their strategic defence partnership, first signed in 2021, which includes a mutual-assistance commitment and has been accompanied by major Greek purchases of French military equipment, including Rafale fighter jets and frigates. The agreement is separate from both NATO and the EU, but its supporters present it as part of a wider web of European resilience.
Such arrangements are becoming more common as European states try to move faster than EU-wide consensus sometimes allows. Bilateral and minilateral formats — including Nordic, Baltic, Franco-Greek, Franco-German and UK-led structures — are increasingly used to coordinate procurement, training, air defence, maritime security and support for Ukraine. The strategic question is how to ensure these formats reinforce rather than fragment European defence planning.
Macron’s comments also touched on the EU’s mutual-assistance clause, Article 42.7 of the Treaty on European Union. The clause requires EU member states to provide aid and assistance by all means in their power if another member is the victim of armed aggression on its territory. It has been invoked only once, by France after the 2015 Paris terrorist attacks. Unlike NATO’s Article 5, however, it is not backed by a standing integrated military command structure.
That difference is central to the current debate. Supporters of a stronger EU defence role argue that Article 42.7 must be made more operational, with clearer procedures, exercises and planning assumptions. Critics caution that any attempt to build parallel EU military mechanisms could create confusion in a crisis, especially for countries that are members of both organisations. The compromise now emerging among several leaders is to make EU mechanisms more practical while keeping NATO as the main collective-defence framework.
For Greece, the issue intersects with maritime security and instability in the eastern Mediterranean and Middle East. Mitsotakis has argued that Europe must be able to protect shipping lanes, energy flows and regional stability, particularly when crises affect the Mediterranean directly. That position aligns with wider EU concerns about naval readiness, critical infrastructure, ports, undersea cables and the security of sea routes linking Europe to global trade.
The leaders’ remarks also reflect growing concern over Europe’s defence industrial base. EU governments have committed to higher spending, but much of the continent still faces shortages in ammunition, air defence systems, long-range strike capacity, drones, electronic warfare assets and military mobility. Officials have warned that spending more will not be enough if procurement remains fragmented across national markets and if European production cannot scale quickly.
Joint procurement is therefore becoming a central test of the EU defence push. European capitals broadly agree on the need to avoid competing national orders that drive up prices and delay deliveries. Yet member states remain divided over how much preference should be given to European manufacturers, how to involve non-EU NATO allies, and how to balance urgent off-the-shelf purchases with the longer-term goal of building European industrial sovereignty.
France has typically pushed for stronger preference for European-made defence equipment, arguing that taxpayer money should help build Europe’s own technological and industrial base. Other states, especially those facing the most immediate threat from Russia, have often prioritised speed and proven capability, including purchases from the United States, South Korea, Israel and other suppliers. The Athens message suggests that this debate will continue, but under the larger principle that EU defence spending should strengthen the alliance rather than compete with it.
The question of US reliability remains the political backdrop. European officials have become more direct in acknowledging that the continent must prepare for a more transactional Washington, regardless of which party controls the White House. US administrations have repeatedly urged European allies to increase defence spending, but recent tensions over trade, Ukraine, NATO burden-sharing and crisis management have made the issue more acute.
European leaders are therefore attempting to speak to two audiences at once. To Washington, they are saying that Europe is finally responding to the demand for greater burden-sharing. To European publics, they are saying that higher defence spending is not merely a concession to the United States, but a response to a changed security environment. To more cautious EU and NATO members, they are saying that autonomy does not mean abandonment of NATO.
The financial implications are substantial. Across Europe, governments are revising defence plans, expanding military budgets and considering new EU-level financing instruments. Some countries are moving toward spending levels well above NATO’s previous 2% of GDP benchmark. Others face political resistance because higher defence expenditure competes with welfare, infrastructure and deficit-control priorities. The defence debate is therefore becoming inseparable from fiscal policy and industrial strategy.
For the EU, the institutional challenge is complex. Defence remains primarily a national competence, and member states retain control over armed forces, deployment decisions and military procurement. Yet the war in Ukraine has shown that EU-level coordination can shape outcomes through funding, sanctions, training missions, ammunition initiatives and support for defence manufacturing. The question now is whether those instruments can be made faster, larger and more predictable.
NATO officials have generally welcomed higher European spending while warning against unnecessary duplication. The alliance’s position has been that stronger European capabilities are beneficial if they are interoperable, available for NATO missions and aligned with alliance planning. That principle is likely to guide the next phase of discussions, particularly as NATO members prepare for further debates on spending targets, force readiness and command arrangements.
The remarks by Macron and Mitsotakis also carry diplomatic weight because France and Greece represent two different but overlapping strands of the debate. France has long pressed for a more sovereign Europe able to act independently when necessary. Greece, while supportive of EU defence integration, has a strong interest in NATO’s continued relevance and in practical military cooperation with allies. Their shared language suggests that the centre of gravity may be shifting toward a formula that blends autonomy with alliance continuity.
Still, unresolved questions remain. EU governments have not yet agreed on how far mutual-assistance planning should go, how new defence funds should be structured, or how to handle procurement from non-European suppliers. Nor is there full consensus on what role the United Kingdom, now outside the EU but still a major European NATO power, should play in EU-linked defence initiatives. These issues will determine whether the current political rhetoric produces operational change.
The immediate message from Athens, however, was clear: European defence integration is being presented not as a replacement for NATO, but as a necessary correction to Europe’s underinvestment and overdependence. Leaders are trying to reassure allies that the EU’s defence push will make Europe more capable, more credible and more useful within NATO, while giving the continent more options in crises where US priorities may differ.
That balance will be difficult to sustain. A more capable Europe may inevitably act with more political confidence, and debates over command, procurement and strategic priorities will test the relationship between the EU and NATO. But for now, the official line from Paris and Athens is that Europe’s defence awakening is not a divorce from the alliance. It is an attempt to ensure that the European side of the alliance can carry more of the load.
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