The barb from Pete Hegseth, Donald Trump’s prospective defence secretary, has landed with the force of a precision strike. His characterisation of NATO as a ‘vestigial Cold War alliance’ and his demand that European members shoulder the full burden of continental defence has triggered an urgent reassessment within the Ministry of Defence. Whitehall sources confirm that contingency plans are being dusted off, models run at Northwood, and quiet signals sent to Paris and Berlin. The unspoken question: can Europe defend itself without the American nuclear umbrella and the logistical backbone of US European Command?
This is not diplomatic theatre. Hegseth’s statement is a strategic vector, designed to force a pivot. The UK has, for decades, structured its defence posture around the assumption of US leadership in NATO. The Army’s heavy armour, the RAF’s integrated air defence, the Royal Navy’s carrier strike group they all rely on American C4ISR, satellite intelligence, and rapid reinforcement from CONUS. If Washington genuinely pivots to the Pacific, or worse, withdraws from Article 5 guarantees, the British Army on the German plain becomes a tripwire without a trigger.
Let us examine the threat vectors. First, logistics. The US provides 70% of NATO’s strategic airlift capability. Without C-17s and C-5s, British forces deploying to the Baltic states would face a supply chain that collapses at the first Russian anti-access/area denial (A2AD) bubble. Second, intelligence. The Five Eyes network is an asymmetric advantage but the US is the primary collector of signals intelligence over Kaliningrad and Belarus. If that tap is turned off, British commanders operate blind. Third, nuclear deterrence. The UK’s independent deterrent is a minimum credible capability. The US extended deterrent is what has kept the Kremlin cautious. Without it, the calculus changes.
The MoD’s response has been characteristically terse. A spokesperson stated that ‘the UK remains committed to NATO and will take whatever steps are necessary to ensure the alliance’s resilience’. Behind closed doors, the language is sharper. Senior officers are voicing concern over the ‘readiness gap’ that would open if American forces drew down. The 2021 Integrated Review’s tilt to the Indo-Pacific already stretched the British military. Now, a simultaneous requirement to backfill US capabilities in Europe could break it.
Let us consider the hardware. The British Army’s Challenger 3 tanks are world-class but there are only 148 of them. The US contributes over 6,000 Abrams tanks to NATO’s order of battle. The RAF’s Typhoon and F-35 fleet total around 180 combat jets. The US Air Force in Europe can surge to over 300. The numbers do not lie. A British-led European defence would require a generational rearmament, one that the Treasury has shown no appetite for.
Yet there is an opportunity here. The crisis might force Europe to finally meet the 2% GDP spending target, and for the UK to take its role as Europe’s leading military power seriously. Joint procurement with France and Germany could standardise munitions and reduce reliance on US supply chains. The Anglo-French Combined Joint Expeditionary Force could be expanded into a genuinely autonomous European rapid reaction force. But this would require political will that has been absent for decades.
The threat from Moscow is not hypothetical. Russian forces are rebuilding, Kaliningrad is bristling with Iskander missiles, and the Zapad exercises demonstrate a capacity for large-scale conventional operations. If the US guarantee wavers, the window for European rearmament is narrow. The UK must act now. Strategic pivots are not reversible. The next move is ours.
