Europe's Contingency Plan for a NATO Without the United States: Strategic Realignment in the Age of Transatlantic Uncertainty

The European NATO member states are advancing the development of a fallback plan with unprecedented dynamism, aimed at ensuring the continent's defense capability even without the involvement of the United States. As reported by the Wall Street Journal on April 15, 2026, citing high-ranking diplomatic circles, these efforts have gained significant momentum following the change in stance of the German government under Chancellor Friedrich Merz. Germany, which had long been a staunch opponent of an independent European defense architecture separate from American leadership, has now signaled its approval of the planning, marking a geopolitical turning point that calls into question the fundamental basis of the transatlantic security order.

The plans, which were first conceived last year and have since been advanced in informal discussions, dinner meetings on the sidelines of NATO sessions, and bilateral consultations, focus on three core areas: maintaining deterrence against Russia, ensuring the operational continuity of NATO structures, and preserving Europe's nuclear credibility. Involved officials explicitly emphasize that this is not a competing project to the existing alliance, but rather an insurance premium in case Washington withdraws its forces from Europe or fails to meet its alliance commitments — a scenario that President Trump has repeatedly threatened.

The strategic context for this acceleration is unmistakable. In recent weeks, President Trump has repeatedly threatened the withdrawal of the United States from the 32-member alliance after several NATO states rejected his demands for support in reopening the Strait of Hormuz. The conflict related to Operation Epic Fury has brought transatlantic relations to a low point. Trump referred to NATO as a paper tiger and called European allies cowards. Furthermore, the White House is reportedly considering withdrawing American troops from countries that have proven uncooperative in the military campaign against Iran and relocating them to more supportive states. Currently, the United States maintains around 84,000 soldiers on the European continent, whose bases not only serve as a central hub for global military operations but also provide significant economic boosts to the host countries.

The personnel and structural reorganization of NATO is at the heart of the European planning. According to the plans, gradually more Europeans are to move into key command positions within the alliance, which have so far been almost exclusively occupied by American generals and admirals. This particularly concerns the Allied Command Europe (SHAPE) in Mons, Belgium, and the associated regional headquarters. In parallel, the gradual replacement of American military capabilities with European equivalents is to be advanced — a task of enormous proportions, considering that the United States currently forms the backbone of NATO logistics, intelligence reconnaissance, satellite communications, and strategic mobility.

Chancellor Merz marked the turning point in the German position last year after Trump appeared willing to abandon Ukraine, thereby raising doubts about the value-based order of American NATO policy. Insiders report that Merz did not want to publicly question the alliance but rather aimed to encourage Europe to take on greater responsibility and shoulder the main burden of defense. This stance marks a fundamental break with the German post-war tradition, which viewed the American nuclear umbrella and US presence in Europe as the pillars of its own security policy. The German Ministry of Defense has also confirmed the funding for the purchase of several hundred Patriot missiles for Ukraine, underscoring the new Berlin determination to take on a more active defense role.

In addition to Germany, the United Kingdom, France, Sweden, and Poland have also joined the planning efforts. Finland's President Alexander Stubb, one of the driving forces behind the initiative, described the development as inevitable. A shift of burdens from the United States to Europe is underway and will continue as part of the American defense and national security strategy, Stubb stated. The most important thing is to recognize this and shape it in a controlled, manageable way, rather than allowing the United States to simply withdraw abruptly. Stubb spoke with Trump to inform him about the European plans and emphasize the need for greater self-responsibility.

The Swedish Ambassador to Germany, Veronika Wand-Danielsson, confirmed the ongoing consultations and spoke of precautionary measures and informal discussions that are taking place. At the Munich Security Conference in February 2026, NATO Secretary General Mark Rutte had already stated that in the coming years, a more European-led NATO would increasingly be experienced — a statement that was then seen as a cautious forecast but must now be interpreted as a manifesto for acceleration.

However, the practical challenges of a European NATO replacement are enormous. The European NATO states lack both the global logistics infrastructure of the United States and its air refueling and strategic transport capabilities. The nuclear component — currently secured by the American nuclear sharing program with the deployment of B61 gravity bombs in Germany, Italy, Belgium, and the Netherlands — would need to be compensated by French and British arsenals, raising complex political and technical questions. France has an estimated 290 operational warheads, the United Kingdom about 225, with both arsenals significantly smaller than Russia's, which has around 1,710 strategic warheads.

The strategic significance of these developments cannot be overstated. Should the plans be realized, it would lead to the most profound restructuring of the European security architecture since the founding of NATO in 1949. Russia will undoubtedly interpret the erosion of the transatlantic bond as a strategic opportunity, while European states face the dual challenge of maintaining deterrence against Moscow and preserving intra-allied cohesion during an unprecedented transitional phase. The question of whether Europe can muster the financial and industrial resources to close the capability gaps that an American withdrawal would leave will shape the coming years.