Operation Lion’s Roar: The Death of Khamenei and the Dawn of the Middle East’s Most Dangerous War -By Fransiscus Nanga Roka, Yovita Arie Mangesti

On 28 February 2026, Israel launched what it called “Operation Lion’s Roar” against Iran, coordinated with a U.S. campaign reportedly named “Operation Epic Fury.” Within hours, Iranian state media confirmed that Supreme Leader Ayatollah Ali Khamenei was dead, killed in strikes on Tehran that also hit senior leadership and key military infrastructure—followed by Iranian missile and drone retaliation across the region.

This is not merely another Middle East escalation. It is a strategic decapitation strike against the core of the Islamic Republic’s authority—an act that, whatever its tactical logic, carries the legal and political DNA of a war that can metastasize faster than diplomacy can react.

The other legal questions involving this conflict: was it reasonably necessary in the circumstances? Did a proportionality of means match the threat posed?

Under Article 2(4) of the UN Charter, states must refrain from the threat or use of force against another state’s territorial integrity or political independence—unless force is justified by Security Council authorization or self-defense (Article 51). In the public reporting so far, there is no indication of a Security Council mandate; hence the legal center of gravity becomes self-defense.

Washington and Jerusalem appear to be positioning the operation as a preemptive strike against “imminent threats” tied up with missiles, nuclear risk, and regional armed networks. That phrasing means something—but in international law cannot simply represent self-defense. It entails at least these aspects:

1.      Imminence (the threat is about to materialize, not speculative)

2.       Necessity (no other reasonable way, including diplomacy, could render the threat harmless)

The heavier end of the spectrum is even states friendly to America and Israel would be unyielding. If your justification sounds more like preventing a future capability than stopping an imminent attack, it resembles the controversial doctrine of preventative war. This was widely condemned as not part of the Charter.

2) Targeting the president: “Assassination” by any other name

The death of Khamenei creates a normative shock that can’t be avoided. International law does not harbor among its otherwise neat principles a clear sentence stating “Never you must target a leader”; instead, legality is created from the surrounding circumstance:

• If a State is involved in an armed conflict w another state and the person targeted satisfies enough criteria for being a legitimate military objective (through his function, direct participation, command role), then the attack could in principle be legal—in which case.the principal constraints are those of distinction and proportionality under IHL.

• If the operation is not lawfully justified in self-defense (jus ad bellum), then even a very accurate operation becomes an unlawful use of force—making the death of a head of state a symbol intensified by this illegality warfare, thereby augmenting backfire dynamics.

This is why the strike is strategically “successful” and strategically catastrophic at one time: not only may it weaken decision-making at the top, but it also removes that last psychological ceiling which often keeps adversaries from directly targeting each other’s core leadership.

3) Proportionality isn’t just about bombs and bombers—it’s about consequences

When assessing IHL proportionality civilian losses projected against concrete and immediate military advantage is weighed. But here, in a region where oil production facilities and military bases as well as nuclear reactors are likely to be next-door neighbors such judgment takes into account predictable second-order effects: attacks on bases, drones overhead in cities to which they have become accustomed anyway, strikes in the Gulf, panic buying in world energy markets, commercial shipping disrupted.

Certainly, financial reporting and live briefings are already a sign that the Strait of Hormuz has the backing of fear and widening regional strikes are on their way.

Simply put, while knocking out one leader could have the “advantage,” human and economic costs mushroom faster than expected, turning into legal issues of guilt when decision-makers could predict a cascade of damage to noncombatants yet proceeded.

4) The succession problem: war plus a vacuum equals big trouble

AP: Khamenei’s death leaves a power vacuum, and while succession technically lies in the hands of Iran’s Assembly of Experts (AOE) it’s shaped in practice by entrenched security institutions.

This is important because while avoiding escalation requires one end of a conversation, it works best if that party has the power to make decisions and then carry them out. A divided leadership will produce the opposite result: parallel lines of counterattack, misunderstanding, and a race to seem “tough enough” take over as Logos.

5) The “most dangerous war” isn’t doing the first strike—it’s what happens afterward.

What makes this moment so infinitely dangerous is not only that Iran, America, and Israel are all sending signals in the worst three-hours of nations’ lives. No, what’s even worse is the following:

1.      The U.S. and Israel both end up on a regime change course which they may not be willing or unable to follow through on.

2.      Iran’s factions are led into a cycle of retaliation that politically they cannot get out of.

Once leaders are targeted and killed, war becomes less about deterrence and more about who survives it. It quickly becomes distorted so that neither negotiating nor averting destruction have a serious chance—the three craziest-speeding accelerants of all time.

If Operation Lion’s Roar marks the end of Khamenei’s rule, it could also mark the dawn of a nastier era: a Middle East in which the old rules of setting up matches out of eyesight crumble down, new matches are struck as soon they go public retaliative cycles break no holds barred diplomacy, and there’s nobody confesses they can still control.