There are two hundred thousand seafarers, oil workers, and coastal communities in the Persian Gulf who live under the constant shadow of a chokepoint that can close in hours. The Strait of Hormuz is not a battlefield - it is a corridor, narrow as a hallway, wide enough for ships but too narrow for mercy when it closes. The Geneva Conventions, especially Common Article 3 and Additional Protocol II, establish that civilian infrastructure essential to survival - including maritime shipping lanes - must not be targeted, nor may its function be deliberately impaired to inflict suffering on non-combatants. Yet when threats are made to close the strait - not as a military maneuver, but as political coercion - the line between strategic leverage and humanitarian violation blurs into a single, dangerous point. Who is protected when a chokepoint becomes a weapon? The rules say: civilians, medical transports, humanitarian shipments. But rules do not stop threats. They only give us something to measure the threat against.

The United States and Iran have both signed the United Nations Convention on the Law of the Sea, which guarantees freedom of navigation through international straits - especially those used for international trade. The Strait of Hormuz carries nearly one-fifth of the world’s oil supply. That is not abstract. That is tankers leaving Khawr al Udayd and Ras Tanura each day, carrying crude that becomes fuel for hospitals in Nairobi, generators in Gaza, ambulances in Ukraine. When a government declares it will “make hell” unless a rival reopens a waterway it has already closed - or claims to have closed - it is not merely escalating a dispute. It is inviting a humanitarian cascade: price spikes that starve the malnourished, insurance premiums that ground cargo planes, port closures that delay vaccine shipments. The suffering is not immediate, but it is predictable. And predictability is the first sign that rules have been abandoned, not ignored.

I remember Solferino. Not the flags, not the orders, not the strategy - only the men. Forty thousand of them, lying where they fell, some still breathing, some already cold, all denied care not because no one had the will to help, but because no one had the system to deliver it. Pity arrived too late. Organisation arrived too slowly. What I learned was not that war is inevitable, but that its worst effects are not. They are the product of absence: absence of medical personnel, absence of protected transport, absence of agreed protocols for access. The same absence repeats today - not in the trenches, but in the shipping lanes, where a single vessel mined or blocked can delay medical supplies for weeks.

The Geneva Conventions do not prohibit military action in the strait - but they do prohibit attacks on civilian shipping, obstruction of humanitarian aid, and the use of starvation as a method of warfare. If a party closes the strait and denies passage to vessels carrying food, medicine, or fuel for civilian hospitals, that is a violation. If it threatens to do so in order to coerce political concessions - knowing full well the ripple effect on global supply chains - that is not just brinkmanship; it is the weaponisation of necessity. And the most dangerous part is not the threat itself, but the silence that follows: no one counts the lives at risk until the crisis arrives, and by then, the damage is already structural.

The International Committee of the Red Cross has repeatedly called for the protection of critical infrastructure in armed conflict - not because infrastructure is sacred, but because when water, power, and transport fail, the wounded die not from injury, but from neglect. The same principle applies at sea. A tanker carrying dialysis equipment is not a military target. A port without lighting, without cranes, without security is not neutral - it is complicit in the delay of care. The rules exist, but they are only as strong as the institutions that monitor them - and those institutions have no presence in the Gulf today. There are no humanitarian observers on the water. No neutral teams ready to verify whether a blocked vessel is carrying protected cargo. No mechanism to report violations and trigger accountability.

This is not about taking sides. It is about taking stock. When the United States warns Tehran, and Tehran responds with its own threats, both sides speak in the language of sovereignty and security. But sovereignty does not include the right to starve strangers. Security does not justify cutting the lifeline of others. The rules are not perfect - they were written in 1949, before supertankers, before drone swarms, before cyber-enabled blockades. But they are not obsolete. They are incomplete. And incompleteness is not a license to ignore them - it is a call to strengthen them.

The humanitarian cost is not yet measured in bodies on the beach. It is measured in delayed shipments, in rising insurance rates, in hospitals rationing fuel. But the next time the strait closes - whether by mines, by threats, or by accident - the cost will be in lives that could have been saved if the rules had been treated as operational, not aspirational. And if no one is counting those lives now, how will we know, later, that we did all we could?