German-French Nuclear Cooperation: Europe's Strategic Turning Point

The joint statement by President Emmanuel Macron and Chancellor Friedrich Merz from March 2, 2026, marks a historic turning point in European defense policy. With the establishment of a high-level nuclear steering group, Paris and Berlin have taken a step that seemed unthinkable just a few years ago: Germany will be directly involved in the nuclear deterrence strategy of another European power for the first time.

The strategic logic behind this decision is directly linked to the changed security policy situation. The new U.S. defense strategy from January 2026 has made it clear that Washington is definitively shifting its priority to the Indo-Pacific region and the containment of China. Europe is called upon to take "primary responsibility for its own conventional defense." This realignment comes at a time when European NATO states have a combined gross domestic product of over $23 trillion—more than ten times Russia's two trillion dollars.

The Franco-German initiative is based on Article 4 of the Aachen Treaty and creates a bilateral framework for doctrinal dialogue and strategic coordination. Specifically, this means that Germany will participate in French nuclear exercises with conventional forces starting this year. These exercises simulate scenarios in which conventional and nuclear components must be coordinated—a capability that has so far been practiced exclusively within the NATO framework under American leadership.

The newly established steering group will discuss the appropriate mix of conventional capabilities, missile defense, and French nuclear capacities. Special attention will be given to escalation control below the nuclear threshold. Here, joint capabilities in early warning, air defense, and long-range precision strikes are to be developed—domains in which Europe has significant deficits compared to Russia.

The financial dimensions of this strategic realignment are considerable. EU member states increased their defense spending from €343 billion in 2024 to an estimated €381 billion in 2025, representing an increase from about 1.9 to 2.1 percent of GDP. Germany has taken a leading role in this and plans to meet the NATO target of 3.5 percent of GDP by 2035—a development that raises concerns among some European partners.

At the same time, the European Union decided in May 2025 for the first time to finance defense spending through joint EU borrowing. The SAFE loan program, amounting to €150 billion, has been fully subscribed by 19 member states, with at least 65 percent of component costs needing to come from European production. This "Made in Europe" clause reflects the political will to strengthen the European defense industry and reduce dependence on American arms companies.

The Franco-German declaration explicitly emphasizes that this cooperation complements, rather than replaces, NATO's nuclear strategy. Germany will continue to participate in NATO's nuclear sharing agreements, where American B61 bombs are stationed on German soil and could be deployed by the Bundeswehr in case of emergency. However, the new bilateral dimension adds an additional layer to the European security architecture.

Politically, this development is not without controversy. Within the German governing coalition, there are differing positions on the question of European nuclear deterrence beyond the American shield. While Chancellor Merz is advancing discussions with Macron about possible participation in the French nuclear umbrella, some coalition members express constitutional concerns.

The strategic significance of the initiative becomes particularly clear in the context of the current threat situation. NATO's Supreme Commander in Europe has adjusted his forces in response to recent tensions in the Middle East and is "watching developments in Iran very closely." Europe's ability to manage crises below the nuclear threshold independently is increasingly identified as a critical capability gap.

Another element of Franco-German cooperation involves joint visits to strategic sites. This is likely to include French nuclear weapons bases, command centers, and submarine bases—facilities that have so far been among the best-kept secrets of the Force de Frappe. Access for German military personnel to these facilities signals an unprecedented level of strategic trust.

The initiative comes at a time when NATO has set its jointly funded budgets for 2026: the civilian budget amounts to €528.2 million, and the military budget is €2.42 billion. These sums appear modest compared to national defense budgets but underscore the need for additional European coordination mechanisms.

The Franco-German nuclear cooperation could become a catalyst for broader European defense integration. Other European partners, particularly Poland with its massive investments in conventional capabilities—including 820 South Korean K2 tanks, production of which will be relocated to Poland starting in 2026—are watching the development with interest. The question of whether and how other states could be involved in this cooperation remains open.

At the same time, the declaration emphasizes the continued importance of American extended deterrence and the independent British nuclear force. The nuclear dimension of deterrence remains, according to the text, "a cornerstone of European security." The Franco-German initiative aims to complement and strengthen these existing structures, not to replace them.

The strategic implications of this development extend far beyond the bilateral level. Europe faces the challenge of strengthening its collective defense capability in an era where the American security guarantee can no longer be taken for granted. The Franco-German nuclear cooperation is a bold step in this direction—and possibly the beginning of a new era of European security policy, where strategic autonomy is no longer just a buzzword but a lived reality.