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Taking the Pulse: Can Europeans Build Their Independent Extended Nuclear Deterrent?

External Publications External Articles
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Confronted with a U.S. disengagement and the Russian threat, Europeans are reconsidering their stance on nuclear deterrence. Given the capabilities of the French and British arsenals, can Europe develop an independent nuclear deterrent?

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Sous-marin à propulsion nucléaire
Sous-marin à propulsion nucléaire
Aleksandr Merkushev/Shutterstock
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[...]

Héloïse Fayet , Research Fellow and Head of the Deterrence & Proliferation Research Program at the Institut Français des Relations Internationales

Forget the fantasy of a Eurobomb or a travelling nuclear suitcase between EU capitals. The real question is how to better leverage the existing arsenals of France and the UK in a Europe where Washington’s commitment is no longer a given. What happens if NATO allies can’t trust that the United States will trade Boston for Berlin?

The answer is not to mimic the American model with tactical nukes scattered across the continent. If Paris and London were to extend deterrence, it would be because their national security is inextricably tied to Europe’s stability. Any adaptation must reflect this.

For France, that could mean clarifying its vital interests and going beyond presidential speeches that require explaining to be correctly understood by allies—but without sharing nuclear decisionmaking or stationing warheads abroad. Those are currently a no-go for Paris. Conventional forces, missile defense, and deep precision strikes must also be part of the equation. Instead of obsessing over warhead numbers, why not start by reinforcing French deployments on NATO’s Eastern flank?

Even though the UK considers it already participates in European security through its nuclear contributions to NATO, London must American-proof its long-term nuclear future in case of diminished cooperation with the United States.

The time for pragmatic nuclear dialogue and political commitments is now.

[...]

> Read the full commentary on Carnegie's website.

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heloise fayet

Héloïse FAYET

Intitulé du poste

Research Fellow and Head of the Deterrence and Proliferation program, Security Studies Center, Ifri

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 A soldier watching a sunset on an armored infantry fighting vehicle
Security Studies Center
Accroche centre

Heir to a tradition dating back to the founding of Ifri, the Security Studies Center provides public and private decision-makers as well as the general public with the keys to understanding power relations and contemporary modes of conflict as well as those to come. Through its positioning at the juncture of politics and operations, the credibility of its civil-military team and the wide distribution of its publications in French and English, the Center for Security Studies constitutes in the French landscape of think tanks a unique center of research and influence on the national and international defense debate.

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Nuclear ballistic missile submarine, in transit on the surface
Deterrence and Proliferation
Accroche centre

The conflicts in Europe, Asia and the Middle East demonstrate a return of nuclear power to the balance of power. Arsenals are being modernized and expanded, while arms control is collapsing. This research program aims to analyze these phenomena.

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Finland: The Ally Who Came in from the Cold

Date de publication
10 April 2026
Accroche

Among all European countries, Finland is perhaps the one whose strategic culture and military model have changed the least since the end of the Cold War. Built after the end of the Second World War to deter a potential new Soviet invasion, this model enabled Finland to serve as an example of European rearmament.

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Stability under Pressure. A Pakistani View on Nuclear Deterrence after Pahalgam

Date de publication
24 June 2026
Accroche

The May 2025 India-Pakistan crisis after the Pahalgam attack has generated a familiar but incomplete debate: did nuclear deterrence work, or did it merely allow both sides to fight a limited war under the nuclear shadow? The better answer is that deterrence worked at the level at which it was designed to work. It prevented a general war and an uncontrolled vertical escalation, and kept nuclear weapons in the background. But it did not prevent India from attempting to carve out space for conventional action, nor did it prevent Pakistan from responding conventionally to restore deterrence credibility.

Rabia Akhtar
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Strategic Shift in NATO’s Support for Ukraine. A Study of NSATU and PURL Initiatives

Date de publication
04 June 2026
Accroche

This study analyzes a significant transformation in NATO’s practical support to Ukraine, marked by the establishment of the NATO Security Assistance and Training for Ukraine (NSATU) mission and the Prioritized Ukraine Requirements List (PURL) funding mechanism.

Iryna KRASNOSHTAN
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French Forward Deterrence: What Is in It for the Baltic States?

Date de publication
25 May 2026
Accroche

For what may be its most significant stress test since the end of the Cold War, European deterrence is under strain. Russia’s war against Ukraine has demonstrated Moscow’s willingness to use force and its ability to combine conventional operations with nuclear signalling, coercive rhetoric, and hybrid actions. At the same time, the gradual deterioration of transatlantic relations has revived concerns about the reliability of extended deterrence.

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Sous-marin à propulsion nucléaire
Aleksandr Merkushev/Shutterstock

How can this study be cited?

Héloïse FAYET, « Taking the Pulse: Can Europeans Build Their Independent Extended Nuclear Deterrent? », External Publications, External Articles, Ifri, 3 April 2025.
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