Switzerland‘s Federal Council declared on Sunday that US and Israeli strikes on Iran constituted a violation of international law, the most unambiguous formal legal position taken by any European government since the Iran war began nine days ago.
It placed Bern alongside Spain, Norway, and France in an emerging coalition of states willing to name the war’s legal deficiency explicitly, even as Germany’s chancellor declined to lecture allies and the E3 bloc issued joint statements that condemned Iran’s retaliation while avoiding any parallel assessment of the strikes that provoked it.
“The Federal Council is of the opinion that the attack on Iran constitutes a violation of international law,” Swiss Defence Minister Martin Pfister told SonntagsZeitung. “In our view it constitutes a violation of the prohibition of violence. The Americans and Israel have attacked Iran from the air. In doing so, they, like Iran, violated international law.”
Pfister called on all parties to halt fighting immediately to protect civilian populations, and was explicit that his legal assessment covered both the initiating strikes by the United States and Israel and the retaliatory Iranian attacks that followed.
Switzerland, which maintains formal neutrality and hosts the International Committee of the Red Cross, the United Nations Office at Geneva, and the repository of the Geneva Conventions, occupies a uniquely authoritative position in international humanitarian law — making its Federal Council’s formal declaration legally weightier than a comparable statement from most other European capitals.
The Swiss position aligned it with Spain’s Prime Minister Pedro Sánchez, who described the US-Israeli campaign as an illegal war conducted without an effective strategy and banned US forces from using Spanish military bases from the opening day of the conflict. That decision prompted Trump to threaten a full US embargo on Spain, a threat he delivered in a Truth Social post this week that prompted French President Emmanuel Macron to express explicit solidarity with Sánchez.
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Macron had described the US-Israeli strikes on March 3 as “conducted outside the framework of international law,” while simultaneously laying the “primary responsibility for this situation” at Iran’s feet — a framing that allowed France to criticise the strikes’ legality while deploying the aircraft carrier Charles de Gaulle to the eastern Mediterranean in what Paris called a strictly defensive operation.
Germany’s position has been the most internally fractured of Europe’s major powers. Chancellor Friedrich Merz, who became the first European leader to visit Trump in Washington after the war began — meeting him in the Oval Office on March 4 — declined to condemn the strikes as unlawful and told reporters he would not “lecture” the United States and Israel.
He declared Germany shared their interest in ending Iran’s nuclear and ballistic missile programmes and expressed “relief that the mullah regime is coming to an end.” But his own Vice Chancellor and Finance Minister Lars Klingbeil offered a sharply different assessment on Sunday, telling the RND newspaper network:
“I have serious doubts that this war is legitimate under international law. I say clearly: this is not our war. We will not participate in this war.” Klingbeil warned of “a great danger that we are sliding ever deeper into a world where there are no longer any rules. We do not want to live in a world where only the law of the strongest applies.”
The disconnect between Merz and Klingbeil reflects a broader European incoherence that analysts from the Council on Foreign Relations, the European Council on Foreign Relations, Carnegie Endowment, and the European Leadership Network all described in published assessments this week as a strategic failure of historic proportions.
The E3 — France, Germany, and the United Kingdom, issued a joint statement condemning “Iranian attacks on countries in the region in the strongest terms,” followed by a second statement saying they would “take steps to defend our interests and those of our allies in the region, potentially through enabling necessary and proportionate defensive action to destroy Iran’s capability to fire missiles and drones at their source.” The statements condemned Iran’s retaliation without addressing the legal status of the strikes that triggered it — a deliberate omission that legal scholars described as intellectually untenable given the UN Charter’s prohibition on the use of force outside of self-defence or Security Council authorisation.
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The European Leadership Network’s assessment was that the US-Israeli attack on Iran was clearly a violation of the UN Charter, condemned by the UN Secretary-General, but that most European leaders had failed to say so publicly, creating a fundamental contradiction between their stated commitment to the rules-based international order and their silence on its most visible current breach. The Carnegie Endowment for International Peace noted that Europe was condemning itself to sideline status at precisely the moment when its diplomatic leverage — with Arab Gulf states desperate for regional security, the United States still defining its objectives, and Iran facing potential internal political transformation — could have been most effectively deployed.
The legal question at stake across all these assessments is whether the United States and Israel possessed a lawful basis under the UN Charter for the February 28 strikes. Article 51 of the Charter permits individual or collective self-defence against an armed attack.
The United States has cited Iran’s nuclear programme, its ballistic missile development, and its support for proxy forces across the region as the justification — a “preventive war” doctrine that the Vatican’s Cardinal Secretary of State Pietro Parolin explicitly condemned on Wednesday as having no basis in international law. The UN Charter’s prohibition on the threat or use of force in Article 2(4) contains no exception for preventive action against a state that has not yet attacked, and the Security Council — where the United States could have sought authorisation — was not consulted before the strikes began.
Italy backed the US-Israeli campaign despite Washington’s failure to warn Italian Defence Minister Guido Crosetto, who was on holiday in Dubai when the strikes began and was left to manage the immediate consequences of Iranian retaliatory strikes on Gulf cities where Italian nationals were present.
Denmark condemned Iran’s behaviour at the UN Security Council emergency session while declining to address the legality of the strikes that preceded it. Norway joined Spain and Switzerland in explicitly naming the legal problem. The divide between governments willing to apply international law consistently and those applying it selectively has become, analysts said, as consequential a fracture in European foreign policy cohesion as the 2003 Iraq War split between governments that supported and opposed the US-led invasion — a comparison whose weight is not lost on European leaders governing countries still politically scarred by that decision.
No coordinated European diplomatic initiative to broker a ceasefire had been formally announced as of Sunday evening.