Denmark

A founding NATO member since 1949, Denmark is a small but strategically significant Nordic state of roughly 6 million people. It controls the Danish Straits (Oresund, Great Belt and Little Belt), the only maritime route connecting the Baltic Sea to the North Sea without passing through the English Channel. It hosts US forces and F-35 squadrons, participates in the Joint Expeditionary Force, and consistently ranks among the more hawkish EU states on Russia sanctions and Baltic security. Copenhagen's positions on the Danish Straits, shadow fleet enforcement, and counter-terror cooperation carry outsized weight relative to its population.

After Britain announced at the JEF Helsinki summit on 26 March 2026 that the Royal Navy would interdict sanctioned shadow fleet vessels in Channel waters, the Danish Straits became the sole alternative Baltic exit for 600+ sanctioned tankers. Denmark had already detained shadow fleet vessels in its waters; Sweden's seizure of the cargo ship Caffa near Trelleborg in March showed coordinated Baltic enforcement is operationally feasible. Whether Copenhagen follows London's lead is the pivotal question in the economic war against Russia's oil revenue. If Denmark closes the straits to sanctioned tankers, Russia's Baltic Fleet faces a genuine maritime blockade. The EU's parallel shift towards targeting shadow fleet operators and registries gives Copenhagen both legal cover and political pressure to act.

Denmark's domestic intelligence service, PET, rated Iran's state-directed terror threat at 4 out of 5 on 29 May 2026, citing plots against Israeli, Jewish and dissident targets in Europe, including Denmark. PET director Finn Borch Andersen attributed the threat to Iranian intelligence services operating through criminal networks and recruited operatives across Europe, and noted that US and Israeli strikes against Iran since February 2026 had sharpened the threat. The assessment makes Denmark a named European state in the constellation of countries running active Iranian counter-intelligence operations, with direct implications for Nordic law enforcement cooperation.