NATO Finland force operations began on Saturday, marking a new phase in the Alliance’s defence posture around Sweden and Finland, its two newest member states, as security concerns remain focused on Russia, the Baltic Sea and the High North.
NATO Finland force begins operations on the northern flank
The new Forward Land Forces Finland (FLF Finland) has been established to strengthen NATO’s deterrence and defence around Finland and Sweden, which now form a central part of the Alliance’s north-eastern flank.
According to Finland’s Ministry of Defence, the force was officially founded on 6 June 2026. It places a Swedish battalion-size battlegroup and a Multinational Staff Element in Rovaniemi under the command of NATO’s Supreme Allied Commander Europe, USA General Alexus G. Grynkewich.
The Finnish government described the launch as a significant step for the security of Finland and the Alliance’s northern flank. Defence Minister Antti Häkkänen said the force would provide NATO with units specialised in Arctic conditions and improve the Alliance’s ability to operate in northern Europe.
The decision reflects a broader strategic shift after Finland joined NATO in 2023 and Sweden in 2024, ending decades of military non-alignment following Russia’s full-scale invasion of Ukraine.
Sweden takes a leading role in Finland’s defence
Sweden is serving as the framework country for FLF Finland, a role that gives Stockholm responsibility for leading the development of the multinational force in close coordination with Finland and NATO.
The core of the force is expected to be a Swedish battalion-size battlegroup of around 600 soldiers, based in Boden in northern Sweden and able to move rapidly into Finland. The structure is designed to be expanded to brigade size if the security situation deteriorates.
This is significant for Sweden’s role inside NATO. The country joined the Alliance only in 2024, but is now taking direct responsibility for a forward presence in one of Europe’s most sensitive security regions.
Other Allies are also involved. The United Kingdom, France, Italy, Denmark and Iceland have announced their participation in the development of FLF Finland, while Norway has also confirmed its role in the initiative.
Why the Baltic Sea and the Arctic matter to NATO
The new force is based in a region where geography shapes security. Finland shares a 1,340-kilometre border with Russia, while Sweden and Finland both sit around the Baltic Sea, a waterway used by Russian naval vessels travelling between St Petersburg and the Kaliningrad exclave.
For NATO, the region connects several strategic theatres: the Baltic Sea, the Arctic, the North Atlantic and the land routes across northern Europe. This makes defence planning more complex, especially in harsh weather and difficult terrain.
General Grynkewich described the area as one of the world’s most strategically important and environmentally challenging regions. That is why FLF Finland is being designed not as a generic deployment, but as a force adapted to Arctic and northern conditions.
The wider aim is deterrence. By placing multinational forces closer to the Alliance’s north-eastern edge, NATO seeks to make clear that any attack on Finland or Sweden would immediately involve several Allies.
Forward forces now stretch across eastern Europe
FLF Finland is part of NATO’s wider network of Forward Land Forces, which already includes multinational battlegroups in Bulgaria, Estonia, Hungary, Latvia, Lithuania, Poland, Romania and Slovakia.
These deployments were developed after Russia’s annexation of Crimea in 2014 and expanded after the full-scale invasion of Ukraine in 2022. Their purpose is not only to defend territory, but also to ensure that Allied troops from several countries are present from the earliest stage of any crisis.
Finland’s case is different from the Baltic states because Helsinki already maintains large national defence forces and a strong conscription-based system. The new NATO presence is therefore intended to reinforce Finland’s own defence capacity rather than replace it.
The launch of FLF Finland shows how quickly the Nordic security landscape has changed. Sweden and Finland are no longer outside NATO’s military structures. They are now helping shape the Alliance’s defence planning in the north, turning the Nordic region into a more integrated part of Europe’s collective security architecture.
