Russia has begun constructing a large new military base just 180 kilometres from the Finnish border, according to satellite imagery analysed by Finnish defence experts. The facility in Novaja Vilga, in the Republic of Karelia, is the first entirely new base built in the region in decades and is assessed to have a capacity of between 4,000 and 6,000 soldiers. Marko Eklund, a former officer in Finland’s military intelligence service, told Finnish public broadcaster Yle that the scale of the construction suggests a permanent garrison designed to project power across a strategically sensitive frontier.

The base at Novaja Vilga is not an isolated case. A joint investigation by Nordic and Baltic media outlets, drawing on satellite imagery and corroborated by Scandinavian intelligence services, identifies over 30 sites along Russia’s western borders—from the Arctic Pechenga region to the Kaliningrad exclave—that are being expanded or reactivated. Old Soviet-era buildings are being razed to make way for modern barracks, vehicle depots, and logistics hubs. Military hardware is already being moved into some locations. Intelligence assessments cited in the investigation suggest that once the war in Ukraine subsides, the Kremlin could station up to 115,000 troops along this arc, a force posture unseen since the Cold War. Viewed from Helsinki, Stockholm, and the Baltic capitals, the construction programme amounts to a step-change in Russia’s military footprint, directly challenging NATO’s newly enlarged northern flank.

The timing of the buildup is inescapably linked to Finland’s accession to NATO last year and Sweden’s pending membership. For Moscow, the neutral status of these nations had long served as a buffer; their entry into the Atlantic alliance has stripped away that de facto cordon sanitaire. Russian official documents and tender notices confirm the construction, signalling a deliberate and publicly acknowledged effort to reinforce the border regions. While the Kremlin may frame the expansion as a defensive necessity, Nordic defence planners see a longer-term offensive potential. Analysts in London note that the concentration of combat-ready formations would allow Russia to threaten the Baltic Sea approaches and NATO’s lines of communication across Northern Europe.

Though the bases are unlikely to reach full operational capability while Russia’s main forces are committed in Ukraine, the building blitz lays the groundwork for a rapid reinforcement once combat operations scale down. NATO’s new northern members have already begun enhancing their own defence postures, with Finland upgrading its road and rail networks for military mobility and Sweden investing in new submarines and coastal defences. Western officials monitoring the situation warn that the infrastructure being put in place is scalable and exceeds what could be justified by simple border security. As the European security order undergoes its most consequential shift since 1945, the Karelian forests are once again becoming a stage for great-power military competition.