On the State Department Memorandum “Operation Epic Fury and International Law”

Key Takeaways

• Rubinstein memo claims self‑defense via ongoing armed conflict with Iran
• No evidence Iran launched an armed attack, violating Article 51 requirements
• Memo conflates jus ad bellum with jus in bello, undermining legal credibility
• Ongoing conflict theory contradicts Trump’s prior statements ending the war
• Flawed justification could weaken UN Charter limits on U.S. force

Pulse Analysis

The State Department’s decision to publish a detailed legal opinion on Operation Epic Fury marks a rare moment of transparency for a war that began in April 2026. By framing the campaign as a continuation of an "ongoing international armed conflict" with Iran, the memorandum seeks to anchor U.S. actions in the collective self‑defense of Israel and an inherent right of self‑defense. This public articulation, however, arrives two months after hostilities commenced and departs from the administration’s earlier narrative that the conflict had already concluded, raising questions about consistency and credibility.

International law under the UN Charter permits force only in response to an armed attack (Article 51) or with Security Council authorization. The memo does not identify a specific Iranian attack that would satisfy the Article 51 trigger, nor does it invoke the narrowly accepted doctrine of anticipatory self‑defense, which the United States has historically avoided. Moreover, it blurs the line between jus ad bellum—the law governing the legality of resorting to force—and jus in bello, which regulates conduct during armed conflict. By relying on ICRC commentary meant for the latter, the document sidesteps the necessity and proportionality tests that remain mandatory even in a protracted conflict.

The broader implications are significant. A legally tenuous justification risks eroding the normative power of the UN Charter and could set a precedent for future administrations to bypass congressional war‑powers oversight, as required by the War Powers Resolution. International partners may view the U.S. stance as a weakening of global legal order, potentially emboldening other states to reinterpret self‑defense thresholds. For policymakers and scholars, the memo underscores the need for rigorous, evidence‑based legal analysis before committing to large‑scale military operations, reinforcing the principle that legitimacy in foreign policy rests on clear, lawful foundations.