When the United States Asks Europe to Become NATO’s Conventional Backbone: Pressures, Opportunities and Fragilities

A shift in alliance tone

The visit by American official Elbridge Colby to Brussels and his invocation of "partnerships not dependencies" is more than diplomatic phrasing: it is a public reiteration of a strategic trajectory that has been brewing for years. The United States, asserting that the current NATO model "is no longer fit for purpose," is urging Europe to assume "primary responsibility for the conventional defense of Europe." Washington simultaneously pledges to retain the extended nuclear umbrella, to contribute "in a more limited and focused manner" to conventional defense, and to continue training and planning with allies. The underlying message is clear: the U.S. is reshaping role allocations within an alliance whose attention and resources are being drawn by competing geopolitical priorities—most notably the Indo‑Pacific competition with China.

Operational roots of a crisis: capabilities and munitions

This is not solely a matter of political will; it reflects a hard industrial and operational reality. The war in Ukraine exposed significant shortfalls in European conventional forces: depleted ammunition stocks, insufficient artillery and missile production, logistical constraints, limited strategic mobility and shortages of critical systems such as high‑end air defense. The PURL process—identifying priority equipment for Ukraine—generated commitments worth hundreds of millions of euros, but many experts stress that faster deliveries and a sustained industrial ramp‑up are essential to avoid stock exhaustion in the event of a protracted conflict.

What "NATO 3.0" would look like on the ground

When Colby speaks of "NATO 3.0" he is not suggesting a cosmetic rebranding but a reconfiguration of deterrence fundamentals: a far more robust and sustainable conventional presence in Europe; the ability to sustain high volumes of munitions and platforms over time; integrated, layered air‑and‑missile defense; rapid logistics and mobilization capabilities; and true interoperability across the entire spectrum—from intelligence and command systems to munitions and maintenance. Achieving these outcomes will require not only increased investment but also deep reforms in joint planning and procurement processes.

Domestic politics: obstacle or engine?

There remains a significant gap between rhetoric and execution. Some European capitals have pledged defense spending increases and taken concrete steps to shore up domestic defense industries. Others face fiscal constraints, pressing social priorities or domestic political opposition that limit their capacity to fund a rapid strategic surge. This divergence in national politics risks producing a patchwork of contributions—useful but uneven—which will not substitute for an integrated, sustained European conventional capability.

Implications for Ukraine and the signal to Russia

PURL and President Zelenskyy’s public appeals for faster delivery of systems such as Patriot missiles underscore a critical test: Europe’s capacity to project power—whether to support a state under attack or to defend its own territory—is being evaluated in real time. If Europe cannot provide a steady stream of necessary equipment and ammunition to Ukraine, the message to Moscow will be that Western conventional pressure can be resilient but not unlimited. That calculation could encourage risk‑taking in the Kremlin, or conversely accelerate European defensive reforms aimed at avoiding total dependence on American nuclear guarantees.

The nuclear umbrella: assurance or political burden?

As Dutch Prime Minister Mark Rutte reiterated, the American nuclear umbrella remains the final guarantor of transatlantic security. While that umbrella offers strategic assurance, it also produces political dilemmas: it preserves stability but reduces the immediate imperative for European states to develop autonomous conventional deterrence. Long‑term reliance on U.S. nuclear protection carries political costs as well, including reduced leverage to resist shifting American geopolitical priorities—precisely the dependency Colby urges Europe to overcome.

Industry and coordination: an emergency agenda

A meaningful leap forward will require concrete policy changes: shared production lines for ammunition, mechanisms for coordinated European procurement rather than ad hoc projects, interoperable strategic stockpiles, and an industrial surge capacity that can be mobilized rapidly in crisis. Delivering these measures implies legislative changes at both EU and NATO levels, fiscal incentives, and multi‑year contracts that provide industry with predictable demand. Absent these reforms, additional defense spending risks remaining fragmented and inefficient.

Colby: "partnerships not dependencies"—a call for Europe to move from demand to strategic offer.

Zelenskyy: "Everything in the air‑defense programme should come faster."—an urgent demand testing European response capacity.

Risks to NATO cohesion

American pressure to rebalance responsibilities could generate political friction: states that feel coerced or unable to make a rapid leap may perceive strategic overreach from Washington. Conversely, if Europe coordinates successfully and builds credible conventional capabilities, NATO could evolve toward a more balanced model able to address threats from the East while accommodating U.S. global priorities. The key challenge is preserving alliance cohesion so that American pressure does not become a catalyst for internal fragmentation.

Medium‑term trajectory

Speed will be decisive: decisions and investments over the next two to three years will determine whether Europe can build sufficient stocks and production capacity to sustain a high‑intensity deployment. Without that, the promised rebalancing risks remaining rhetorical rather than operational. In practical terms, PURL and the steady flow of munitions and systems to Ukraine are immediate priorities; paradoxically, the urgency of supporting Ukraine could catalyze the reconstruction of European defense industrial and logistical capabilities.

The Warhial Perspective

Two certainties stand out: the United States is repositioning, and Europe possesses the material means—but not necessarily the political will or institutional mechanisms—to assume a larger conventional burden. If Europeans confine themselves to declarations without building a common industrial and logistical architecture, they will remain vulnerable to prolonged shocks. The most likely outcome is a fragmented advance: key states and regions (Poland, the Baltic countries, the United Kingdom, Scandinavia) will fortify robust nuclei of conventional defense, while others will continue to rely primarily on American nuclear guarantees. This will not be a linear transition but a political contest between competing visions: European strategic autonomy versus continued transatlantic leadership by the United States. The Warhial recommendation is explicit and urgent: Europe must prioritize a package of immediate measures—five‑year common industrial contracts, interoperable stockpiles, and a clear plan to ramp up munitions production—otherwise "NATO 3.0" will remain merely a label and the strategic window to secure tangible stability will close quickly, to the advantage of adversaries testing transatlantic cohesion.