Finland has joined France’s nuclear deterrence initiative, bringing Helsinki into the same European framework already supported by Denmark, Sweden and Norway. The decision, announced on 14 September, strengthens bilateral defence cooperation with France while remaining separate from NATO’s nuclear arrangements.
According to the Finnish Ministry of Defence, Finland and France concluded confidential talks conducted at both political and official level before issuing a joint declaration on Helsinki’s participation.
The move makes Finland the tenth country to join the initiative and means that Denmark, Finland, Norway and Sweden are now all participating. Iceland is not among the countries involved.
Finland joins the French nuclear deterrence framework
President Emmanuel Macron introduced the concept in March 2026 as part of a broader discussion about the European dimension of France’s independent nuclear deterrent.
France calls the concept “forward deterrence” (dissuasion avancée). It is intended to deepen strategic cooperation between France and participating European countries without transferring control over French nuclear weapons or creating a shared European nuclear arsenal.
For Finland, participation could include discussions about French nuclear doctrine, joint exercises in which Finnish forces participate with conventional capabilities, or Finland attending exercises as an observer.
At the most advanced level, cooperation could also involve the temporary presence of elements of France’s strategic air forces in Finland. The precise form of Finnish participation has not yet been determined and will be developed through further bilateral discussions.
France and Finland are expected to establish a nuclear steering group in the coming months to begin implementing the agreement.
No nuclear weapons stationed in Finland in peacetime
The agreement does not give Finland any authority over France’s nuclear arsenal. The French president will continue to hold exclusive decision-making power over the use of the country’s nuclear weapons and over the definition of France’s vital interests.
Finland has also ruled out the stationing of nuclear weapons on Finnish territory in peacetime, President Alexander Stubb said following the announcement, according to Reuters.
Participation does not create obligations comparable to collective defence and France is not asking partner countries to contribute financially to maintaining its nuclear deterrent.
The initiative must also remain compatible with existing international obligations, including the Nuclear Non-Proliferation Treaty and the Comprehensive Nuclear-Test-Ban Treaty.
A European deterrent alongside NATO
Both Helsinki and Paris have stressed that the French nuclear deterrence initiative does not replace NATO’s nuclear deterrence.
NATO’s framework relies primarily on the extended deterrence provided by the USA, together with the Alliance’s nuclear-sharing arrangements. France maintains its own independent nuclear forces and does not participate in NATO’s Nuclear Planning Group.
The French initiative therefore creates a separate channel for European countries to discuss deterrence directly with Paris while remaining within NATO’s wider security architecture.
For Finland, which joined NATO in 2023, the decision adds another layer to its defence relationship with a major European military power. Minister of Defence (Puolustusministeri) Antti Häkkänen said Finland’s participation also reflects the need for Europe to assume greater responsibility in both conventional defence and nuclear burden-sharing.
The Nordic countries move closer on nuclear deterrence
Finland’s decision also has a Nordic dimension. Denmark, Sweden and Norway had already joined France’s forward deterrence initiative, meaning that four of the five Nordic countries are now involved in the same emerging framework.
Sweden has already moved beyond the initial political declaration. France and Sweden held their first bilateral nuclear steering group meeting in Paris in April, starting work on a roadmap for strategic cooperation.
The Nordic countries remain under NATO’s collective defence system, and the French initiative does not create a separate Nordic nuclear arrangement. However, the convergence of Denmark, Finland, Norway and Sweden around the same French framework shows how nuclear deterrence is becoming a more explicit part of the European defence debate.
Finland’s next step will be to define the practical scope of its cooperation with France. The initiative remains deliberately flexible, but Helsinki’s participation strengthens an emerging European layer of deterrence at a time when European governments are seeking a larger role in their own security.
