The NATO member is overhauling its military strategy, moving troops closer to the border and investing in long-range arms as Russia is carrying out grey-zone tactics in NATO’s eastern flank; the country’s defence spending is set to rise by 42% in 2026, reaching €2.4 billion, or around 5.4% of its GDP; the U.K. has maintained some 1,200 troops in Estonia as part of NATO’s forward defence