French President Emmanuel Macron is set to unveil his vision for how France’s nuclear arsenal could strengthen Europe’s defence posture, as the continent moves to re-arm in response to an increasingly assertive Russia and shifting priorities in Washington.
Macron will deliver the closely watched speech on Monday at France’s Île Longue nuclear submarine base in Brittany — the heart of the country’s sea-based nuclear deterrent. His address comes at a time when European leaders are reassessing their reliance on the United States’ nuclear umbrella under NATO amid uncertainty surrounding US foreign policy.
According to members of his team, the president is expected to introduce “fairly significant shifts and developments” in France’s nuclear doctrine, though specific details have not been disclosed. Macron has previously suggested that France — the European Union’s only nuclear-armed state — should consider how its deterrent could contribute more directly to Europe’s collective security.
Earlier this month, he floated the possibility of “special cooperation, joint exercises, and shared security interests with certain key countries.” Last year, he also signalled readiness to discuss the potential deployment of French aircraft armed with nuclear weapons to other European nations.
France possesses the world’s fourth-largest nuclear arsenal, estimated at around 290 warheads. The United Kingdom, which left the European Union in 2016, remains the only other nuclear power in Europe. By comparison, the United States and Russia hold thousands of warheads each.
Although US officials have reiterated that Washington’s nuclear deterrent remains committed to protecting Europe under the NATO alliance, concerns persist about long-term reliability, particularly under President Donald Trump’s leadership.
Bernard Rogel, a former top military adviser to Macron, said discussions are under way on how French and British deterrence capabilities could integrate into a more assertive European defence framework. However, he stressed that ultimate control over France’s nuclear launch decisions would remain in Paris.
“I can’t see us having 27 buttons. From a credibility standpoint, that just doesn’t work,” Rogel said, referring to the European Union’s 27 member states.
German Chancellor Friedrich Merz recently confirmed he is holding confidential talks with Macron on European nuclear deterrence. Meanwhile, British Prime Minister Keir Starmer has said the UK’s nuclear shield already protects NATO allies, adding that London is enhancing nuclear cooperation with France.
Still, questions remain over how any shared European nuclear framework would function politically and operationally. Tensions have also surfaced over defence spending. German Foreign Minister Johann Wadephul recently urged Paris to match its rhetoric on European security sovereignty with concrete financial commitments.
Policy analysts say public opinion across parts of Europe is shifting in favour of a stronger regional deterrent. Rafael Loss of the European Council on Foreign Relations noted growing support in countries including Germany, Poland, Spain and Denmark for exploring alternatives to sole reliance on the US umbrella.
France, while a NATO member, does not assign its nuclear forces to the alliance. In his last major doctrine update in 2020, Macron called for strategic dialogue within the EU on the role of France’s deterrent.
The debate intensified after Russian President Vladimir Putin invaded Ukraine in 2022 and repeatedly invoked Moscow’s nuclear arsenal. At the same time, Washington’s evolving priorities have pushed European leaders to consider greater strategic autonomy.
Analysts warn that Macron’s speech carries significant political risk at home. With approval ratings under pressure and the 2027 presidential election approaching where far-right leader Marine Le Pen is widely seen as a strong contender any move to Europeanise France’s nuclear doctrine could trigger domestic backlash.
Florian Galleri, a historian specialising in nuclear doctrines, said the address must strike a careful balance.
“This speech creates expectations,” he said. “If it is weak, people will wonder why it was made. If it is strong, with real changes, the consequences could be significant.”
Macron’s remarks are expected to shape the next phase of Europe’s evolving security debate at a time of mounting geopolitical uncertainty.
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