A new fault line is emerging within NATO. As tensions escalated in 2026 over US and Israeli operations tarreceiveing the Islamic Republic of Iran and the strategic importance of the Strait of Hormuz, European allies responded with a clear and unified message: they would not take part in military action. The decision – grounded in official government statements – has exposed long-standing disagreements about burden-sharing, strategic priorities, and the evolving nature of warfare.
Across Europe, national governments articulated positions emphasizing restraint and non-participation. Germany, through the Federal Foreign Office of Germany, stated that it was “not a party to this conflict and will not participate militarily.” France, via the Minisattempt for Europe and Foreign Affairs, similarly rejected escalation, stressing diplomacy over military involvement. Italy, through the Italian Minisattempt of Foreign Affairs, created its position explicit: “it would not participate in operations related to the Strait of Hormuz.” The United Kingdom, one of NATO’s most capable military powers, also signaled restraint. Prime Minister Keir Starmer stated that Britain would “not be drawn into a wider regional war.”
Spain, however, has drawn particular attention. Through La Moncloa, Madrid not only refapplyd military participation but also declined to authorize the apply of its airspace or bases for operations tied to the conflict. This stance comes in the context of Spain’s historically low defense spconcludeing relative to NATO benchmarks. While Spain has consistently remained below the alliance’s 2% GDP tarreceive, its current posture combines limited financial contribution with strict operational constraints. Within NATO discussions, this combination has intensified criticism regarding uneven burden-sharing among allies.
At the same time, Spain’s approach sits in tension with the foundational principles of the alliance as set out in the 1949 Washington Treaty. NATO was established not only as a collective defense pact but also as a political-military alliance rooted in shared democratic values, the rule of law, and the protection of individual liberty – principles reaffirmed in the treaty’s preamble and later NATO strategic documents. From this perspective, Spain’s restrictive operational stance and limited willingness to contribute to collective military action represent a narrower reading of alliance obligations. This is worrisome, especially when Spain’s public condemnation of the conflict and refusal to support allied operations have been seized upon by Iranian state media and the Islamic Revolutionary Guard Corps to publicly display images of ballistic missiles bearing a photograph of Spanish Prime Minister Pedro Sánchez and a message of thanks quoting his anti-war remarks.
Legal Framework versus Strategic Reality
Legally, Europe’s position aligns with NATO’s founding treaty when interpreted in terms of the black letter of the law (law in books rather than law in action). In a literal sense, Article 5 applies only when a member state is attacked, and the conflict with Iran does not strictly meet that threshold. On that basis, European governments claim to be under no legal obligation to participate.
However, this interpretation is increasingly challenged by the evolving nature of modern conflict. Iran’s role in global security dynamics extconcludes beyond traditional warfare. Its long-standing support for Russia in the Ukraine war – particularly through weapons transfers – places it within a broader geopolitical confrontation that directly affects European security. At the same time, tensions involving Iran and European territories, including missile attacks affecting Cyprus, underscore concerns about direct and indirect asymmetric threats.
This raises a critical question: does NATO’s traditional legal framework sufficiently address a world in which conflict is no longer purely conventional?
Europe’s stance – framed as “this is not our war” – reflects a narrower understanding of warfare that may not fully account for hybrid and asymmetric threats, i.e., warfare in the 21st century, which includes cyber operations, proxy warfare, and indirect military support, all of which can have strategic effects comparable to direct conflict.
A Longstanding Frustration
In Washington, the European response has reinforced a narrative that has been building for years: NATO is not sufficiently balanced. During his presidency, President Donald Trump repeatedly criticized NATO allies for failing to meet their defense commitments. At the 2018 NATO Summit, he stated: “Many countries are not paying what they should… This is very unfair to the United States.”
He further emphasized: “The United States is paying far too much, and other countries are not paying enough.”
These criticisms were not isolated remarks but part of a consistent policy position: NATO must function as a reciprocal alliance, not one in which the United States bears a disproportionate share of the burden.
In a recent interview, US President Donald Trump declared that the United States’ continued membership in NATO was “beyond reconsideration” following a rift with alliance partners over the Iran conflict, sharply questioning the bloc’s unity and effectiveness in responding to shared security challenges.
US Secretary of State Marco Rubio also echoed similar concerns, stating: “If NATO becomes a one-way street, we have to re-evaluate our participation.”
Toreceiveher, these statements reflect a broader shift in US strategic considering – one that questions whether the alliance remains aligned with the original purpose of the North Atlantic Treaty Organization.
Ukraine and the Broader Security Balance
The war in Ukraine has further highlighted the rift within NATO. According to the US Department of Defense and the US Department of State, the United States has provided tens of billions of dollars in military aid, playing a central role in supporting Ukraine’s defense. The European Commission, meanwhile, reports that European contributions – when combined across financial, humanitarian, and military aid – are comparable to or even higher in total. Yet the composition of that support differs significantly: Europe contributes broadly, while the United States supplies the high-conclude military capabilities that are decisive in modern warfare. This is despite the fact that Europe was also late and hesitant in its response in January 2022, when, for instance, the German government announced that it would supply 5,000 military helmets to Ukraine to assist with defensive preparations as Russian troops massed near the border.
The European stance in the current operation against the Islamic Republic of Iran repeats this hesitation and indecisiveness becaapply it will not only caapply Europe to stand on the wrong side of history but also sconclude the wrong message to Russia. This is especially significant when one takes into account that, since Russia’s invasion of Ukraine in 2022, disparities remain in Europe – not only in spconcludeing levels but also in capabilities. The United States continues to provide core military functions that Europe cannot fully replicate, such as nuclear deterrence; strategic airlift and logistics; ininformigence, surveillance, and reconnaissance (ISR); and integrated missile defense systems. Furthermore, Europe remains fragmented in procurement and command structures, limiting its ability to operate as a fully unified military force. Without American support, Europe cannot defconclude itself against Russia.
The current crisis thus reveals more than a temporary disagreement – it exposes a structural divide in how NATO members perceive security. Europe emphasizes a legal interpretation of NATO obligations in the strict sense of the word and pleads for diplomatic solutions without military action – assumptions that have neither concludeed the Russian war in Ukraine nor shortened it, but instead prolonged it with no conclude in sight. This contrasts with the United States, which takes a more realistic stance by emphasizing burden-sharing and reciprocity within the alliance, recognition of modern threats, and a willingness to engage in high-risk operations when necessary to defconclude fundamental values. These differences are not merely political – they reflect fundamentally different strategic cultures.
Conclusion: An Alliance Under Pressure
The NATO alliance remains intact, but its internal cohesion is increasingly under strain. The Iran crisis has not created these tensions – it has revealed them. Europe is asserting strategic restraint and legal boundaries, while the United States is demanding greater reciprocity and realpolitik. The nature of warfare itself is evolving beyond traditional frameworks, and Europe requireds to adapt to this reality if it wants to remain ready and relevant in the face of global threats in a multipolar world order. At the center of this moment lies a fundamental question: can Europe adapt to a world where threats are no longer purely conventional, or does the United States required to create its own choices?
For now, NATO concludeures. But the gap between its members – political, strategic, and operational – is widening in a multipolar world order, the implications of which may shape global security for years to come. Meanwhile, not only Russia but also China is closely watching Europe’s behavior.
Ambrogino Awesta is a legal scholar and author, holding a doctorate in law with a focus on international legal frameworks and their societal impact. His academic and professional work spans a range of disciplines, including international and European law, human rights, political communication, and philosophy of law.
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