The EU's Plan to Survive If Trump Leaves NATO — Classified Until Now, Partially Revealed

European governments have been preparing contingency plans for US NATO exit for months. Here is what is known about what Europe would do and how realistic its options actually are.

European defence planning for the contingency of US NATO withdrawal has been underway in various forms since Trump's first term demonstrated that the once-unthinkable was potentially thinkable. The acceleration of this planning since Trump's second inauguration, and the specific escalation produced by his April 2026 'absolutely considering' statement, has moved these contingency exercises from theoretical planning into more operationally concrete preparation.

The public information about European contingency planning comes from several sources: official EU defence strategy documents, statements from European defence ministers, and reporting from European security journalists who have access to background briefings from officials who are more candid about the planning than their public statements suggest.

What is known: several European governments have been conducting bilateral security consultations — Germany-France, Germany-Poland, France-UK — that are specifically framed around 'what does European security look like without guaranteed US Article 5 commitment?' These consultations have produced documents that are classified but whose conclusions have been partially described by officials in background conversations.

The conclusions are sobering. European NATO without US participation cannot provide equivalent deterrence to Russian military power in the timeframes relevant to military planning. The specific capabilities that are most difficult to replace — satellite intelligence, long-range precision strike, nuclear deterrence, air superiority against advanced systems, logistical sustainment at scale — require years and billions of euros of investment that do not yet exist.

France's nuclear weapons are the one European capability that provides some deterrence against Russian nuclear use. The question of whether French nuclear weapons can be credibly extended to cover other European states — the European nuclear deterrence question that Macron has repeatedly raised — is being discussed with more urgency and fewer social inhibitions than previously.

The most honest European planning document would describe a defence capability gap that cannot be closed in less than ten years of sustained investment — which means the contingency planning is primarily about managing the transition period, not about achieving genuine adequacy quickly.