Paris — A few days after strikes by the United States and Israel on Iran, President Emmanuel Macron used a March 2 speech to signal a shift in France's posture on nuclear forces. He said France will bolster its deterrent and step up cooperation with European countries under a policy he called forward deterrence.

Why Macron moved now

Macron framed the announcement as a response to fast changing global risks and a concern that some European states can no longer fully rely on the US nuclear umbrella. He said Europeans need to regain control of their own destiny, and that we live in "another strategic universe." He added that "the next half century ... will be an age of nuclear weapons."

Analysts see the speech as both a display of strength and a confirmation of long standing French doctrine. Geopolitical analyst Gr?goire Roos pointed out that France has always considered its nuclear posture with a European dimension, not only a national one. For France, the geographic scope of what it calls vital interests tends to extend beyond its borders, and Paris prefers to keep that scope intentionally vague.

What France plans to do

Key elements in Macron's announcement include:

  • Maintaining and strengthening France's nuclear deterrent. France currently ranks fourth in the world by size of arsenal, with roughly 290 warheads.
  • Ceasing public disclosure of the exact number of warheads, a move intended to preserve strategic ambiguity.
  • Closer cooperation with several European partners, including the United Kingdom and a group of EU countries such as Germany, Poland, the Netherlands, Belgium, Greece, Sweden and Denmark.
  • Exploring ways to project deterrence beyond French territory, for example by positioning aircraft capable of nuclear delivery on allied soil, while keeping operational control and decision making sovereign.

Roos described this as a balancing act rooted in the Gaullist tradition that treats nuclear forces as a shield for France's territory and political independence. He emphasized there will be no sharing of nuclear codes or delegation of nuclear decision making.

Where Iran fits in

The announcement came as the conflict in the Middle East intensified and Iran's nuclear activities rose up the agenda. France remains opposed to Tehran acquiring nuclear weapons and continues to favor a diplomatic route. Laure Foucher, a researcher at the Foundation for Strategic Research, said France believes the nuclear issue in Iran should be handled politically rather than by military action, and that regime change is not the solution.

Macron also publicly condemned the US and Israeli strikes on Iran, calling those strikes outside international law.

A brief reminder of France and Iran's recent history

France and Iran have a complicated past on nuclear cooperation. In 1974 Iran took a 10 percent stake in Eurodif, a French enrichment company, aiming to support civilian energy. After the 1979 revolution, relations deteriorated, disputes over payments and political tensions followed, and France later settled the remaining Eurodif debt with a large payment. The episode included hostage crises and allegations of Iranian involvement in attacks on French soil during the 1980s.

Costs and hurdles

Experts warn that updating and expanding nuclear capabilities is expensive. Roos estimated that making French deterrence ambitions sustainable would require substantially more funding, suggesting an increase on the order of 100 billion euros per year. That level of spending would mean cuts or reallocation elsewhere, and it will be politically difficult to secure.

Macron faces domestic political limits. His term ends in April 2027 and some analysts say he is using foreign and defense policy to build a legacy. To succeed, Paris will need stronger European coordination and clearer commitments from partners on the direction and funding of a joint security approach.

What this means for Europe

Macron's speech underlines a push for greater European strategic autonomy, especially in deterrence. Whether this becomes a true shift in European defense policy depends on budgets, political will across capitals, and how allies respond to proposals for closer nuclear-related cooperation.

For now, the announcement is a high profile signal: France wants to keep nuclear deterrence central to its defense strategy and to encourage European partners to be more active in their own security planning.