The recent public assault on Nato by US Defense Secretary Pete Hegseth is not a diplomatic gaffe. It is a calculated signal of a strategic pivot that has been brewing in Washington for years. Hegseth’s remarks, dismissing Nato as a ‘relic’ and questioning the value of collective defence, are a direct threat vector aimed at the alliance’s cohesion. For the United Kingdom, the implications are immediate and severe: the American security guarantee that has underpinned European defence since 1949 is no longer a reliable asset. The UK must now confront the reality of leading a European defence architecture without US command-and-control integration.
Let us be clear about the hardware and logistics. Nato’s deterrent posture relies on US strategic enablers: intelligence, surveillance, and reconnaissance satellites; airborne early warning; strategic airlift; and the nuclear umbrella. Without these, the European pillar is a hollow shell. The UK’s own defence review, after cuts to the army to 72,500 troops and the retirement of key platforms, leaves the British military overstretched. The Royal Navy has six destroyers, only half of which are deployable at any time. The Army’s Challenger 2 tanks number 227, a fraction of what would be needed for a major land war. The RAF’s Typhoon fleet is aging, and the F-35 programme remains underfunded.
Hegseth’s attack comes at a moment of maximum vulnerability. Russia’s defence industrial base is operating on a war footing, producing artillery shells at rates that outstrip Nato’s combined capacity. Moscow has rebuilt its ground forces after losses in Ukraine, and the Baltic states, Poland, and Romania are now within striking distance of Russian Iskander missiles. The US pivot to the Indo-Pacific means that any future conflict in Europe would see American forces deployed as a reserve, not as the tip of the spear. This is a classic intelligence failure: we have assumed the US commitment was immutable.
The call for the UK to lead European defence is not a compliment; it is a burden. Whitehall must immediately accelerate procurement of long-range precision strike missiles, expand the Royal Navy’s escort fleet, and restore the Army’s armoured divisions. Cyber warfare must be prioritised: Russian state actors have already probed UK energy grids and communications networks. The UK’s National Cyber Force needs to be on a permanent offensive footing, deterring attacks before they happen.
There is also the question of nuclear deterrence. The UK’s independent nuclear deterrent, based on Trident missiles, is the ultimate guarantee. But with the US providing maintenance and targeting data, can we truly operate it alone? This is a open source intelligence gap that must be closed. Parliament should demand a strategic defence review that assumes no US support in a crisis.
Hegseth’s words are a strategic pivot. The UK must match it with a pivot of our own: from a dependent ally to a European power with independent military capabilities. The window for action is narrow. Every day of delay is a gift to hostile state actors watching from Moscow, Beijing, and Tehran.
