Europe’s New Nuclear Deterrence Debate and France's Answer

On March 2, 2026, in a speech at France’s Île Longue base, French President Emmanuel Macron unveiled major changes to France’s nuclear deterrence doctrine. First, Macron announced an increase, the first since 1992, in France’s nuclear stockpile. France currently maintains 290 warheads and will increase that number to a now-undisclosed count. He also announced a new doctrine, what he called “forward deterrence.” This is a partnership with seven European countries—Germany, Poland, Belgium, Denmark, Greece, the Netherlands, and Sweden—on strategic issues. That cooperation will include partner participation in nuclear exercises and the potential for France to temporarily deploy nuclear armed fighter jets to other European countries. While France will maintain the independence of its nuclear command and control and remain outside of NATO’s nuclear mission, this extension of the French nuclear umbrella represents a significant shift in French policy in response to the new realities of the European security environment, which includes a less reliable commitment from the United States.

To help us understand these changes and to talk through broader implications of a declining U.S. presence in Europe for European strategic deterrence, Brussels Sprouts is excited to welcome Claudia Major and Bruno Tertrais to this week’s show.

Claudia Major is the senior vice president of Transatlantic Security at the German Marshall Fund.

Bruno Tertrais is the deputy director of the Foundation for Strategic Research and a non-resident fellow at the Institut Montaigne.

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