French President Emmanuel Macron is set to unveil his vision on Monday for how France’s nuclear arsenal could play a broader role in Europe’s defence, as the continent accelerates rearmament amid an increasingly confrontational Russia and waning confidence in long-standing U.S. security guarantees.
Macron will deliver the closely watched address at France’s Île Longue nuclear submarine base. For decades, European security has relied heavily on the United States’ nuclear umbrella through NATO, but shifting geopolitical realities have intensified debate over whether Europe should strengthen its own deterrence capabilities.
According to officials close to the president, Macron is expected to update France’s nuclear doctrine, with “fairly significant shifts and developments” anticipated, though specific details remain undisclosed. France is currently the European Union’s only nuclear power and maintains the world’s fourth-largest nuclear arsenal, estimated at around 290 warheads. The United Kingdom no longer an EU member remains Europe’s only other nuclear-armed state.
Macron has previously argued that France should explore how its nuclear forces could contribute to protecting Europe more broadly. Earlier this month, he suggested a doctrine that could involve “special cooperation, joint exercises, and shared security interests with certain key countries,” and last year he signaled openness to discussions on deploying French nuclear-capable aircraft in other European states.
The debate has gained urgency as reassurances from Washington have failed to fully allay European concerns, particularly under U.S. President Donald Trump, whose administration has emphasized shifting priorities away from Europe. Meanwhile, Russia under President Vladimir Putin has repeatedly invoked its nuclear arsenal since invading Ukraine in 2022.
Former senior military adviser Bernard Rogel said Europe must now reflect on how French and British deterrence could fit into a more assertive continental defence posture. German Chancellor Friedrich Merz confirmed this month that he is holding confidential talks with Macron on European nuclear deterrence, while UK Prime Minister Keir Starmer has said Britain’s nuclear forces already protect NATO allies and that cooperation with France is being enhanced.
Despite growing momentum, major questions remain. Control over nuclear launch decisions would stay firmly in French hands, with Rogel warning that shared authority among the EU’s 27 states would undermine credibility. Budget constraints in France and tensions with Germany over defence spending have also exposed fault lines in any future arrangement.
Support for a European nuclear deterrent appears to be rising across the continent. Analysts at the European Council on Foreign Relations note increasing public backing in several countries for developing an alternative to exclusive reliance on U.S. protection, with some experts arguing that French and British nuclear forces may need to expand or evolve.
Macron’s speech is expected to generate high expectations and potential controversy both abroad and at home. With approval ratings under pressure and the 2027 presidential election approaching, critics warn that a misstep could provoke political backlash, particularly from the eurosceptic far right led by Marine Le Pen.
As Europe reassesses its security architecture, Macron’s address could mark a pivotal moment in redefining the role of nuclear deterrence on the continent or expose the limits of consensus in a rapidly changing strategic landscape.
