The crisis in the Strait of Hormuz

Wednesday 11 March 2026

The narrow waters of the Strait of Hormuz have long been one of the world’s most dangerous geopolitical fault lines. In the present Middle Eastern war they are once again assuming the character of a decisive battlefield. Although the conflict between Iran and the United States together with Israel has so far been fought largely through air strikes, missile exchanges and proxy warfare, the struggle for control of this maritime chokepoint may soon become the defining operational theatre of the war.

The stakes are extraordinary. Roughly one fifth of the world’s oil exports transit the Strait, making it perhaps the most strategically important maritime passage on Earth. When hostilities erupted in late February 2026 following joint United States–Israeli strikes on Iranian targets, commercial shipping through the Strait collapsed almost immediately. Tanker traffic fell sharply as insurers withdrew war-risk coverage and vessels waited outside the Gulf for clarity about whether safe passage could still be guaranteed. 

The result has been a situation in which the Strait has not been formally closed but has effectively ceased to function as a routine shipping lane.

Geography as a weapon

The Strait of Hormuz is uniquely suited to asymmetric warfare. At its narrowest point it is only about forty kilometres wide, with designated shipping lanes only a few kilometres across. The northern side of these lanes lies close to the Iranian coast, allowing Iranian forces to operate at extremely short distances from international shipping. 

This geography has shaped Iranian naval doctrine for decades. Iran cannot hope to defeat Western navies in a conventional fleet engagement, but she does not need to do so. Instead she relies upon an anti-access strategy built around mines, missile batteries, swarms of fast attack boats and increasingly large fleets of drones.

The object is not permanent closure but disruption. A handful of damaged tankers or credible threats to insurance companies can be sufficient to halt commercial traffic. The present crisis has already demonstrated this dynamic. Even limited attacks on vessels and coastal infrastructure have been enough to halt most commercial transits through the Strait. 

Iran’s naval capabilities

Iran’s principal maritime forces in the region belong to the Islamic Revolutionary Guard Corps Navy rather than the regular Iranian Navy. The IRGC has specialised for decades in asymmetric operations designed to overwhelm larger fleets through swarm tactics.

The principal tools at Tehran’s disposal include naval mines, which can be laid quickly by small craft or submarines; anti-ship missiles deployed along the coast and on offshore islands; unmanned surface vessels and aerial drones; and fleets of high-speed attack boats capable of approaching tankers at close range. Analysts believe that such tactics could disrupt shipping for months even if Iran could not permanently close the waterway. 

Iran has already demonstrated her willingness to use maritime coercion in the Strait. In 2024 Iranian commandos seized the container ship MSC Aries, illustrating Tehran’s readiness to board or capture vessels suspected of links to her enemies. 

The western coalition response

Opposing Iran in any battle for the Strait would be a coalition of navies led by the United States but likely including Britain, France and regional partners such as Saudi Arabia, the United Arab Emirates and possibly India or Japan, whose economies depend heavily on Gulf energy supplies.

Recent developments suggest that such a coalition is already forming. European leaders have begun discussing escort missions to protect commercial shipping, while France has announced deployments of additional naval vessels to the region in anticipation of such operations. 

The United States Fifth Fleet, headquartered in Bahrain, remains the dominant naval force in the Persian Gulf. Carrier strike groups, destroyers equipped with missile defence systems and specialised mine-countermeasure vessels would likely form the core of any effort to reopen the Strait.

Yet even overwhelming naval superiority does not make the problem simple. Mines must be cleared slowly and methodically, while small boats and drones can appear unexpectedly across a wide maritime area. The challenge is less a conventional battle than a continuous policing operation under hostile conditions.

The likely time scale

The timeline of any struggle for control of the Strait will depend heavily upon Iran’s strategic objectives. If Tehran merely seeks to signal strength and retaliate symbolically for attacks on her territory, disruption may last only weeks. But if the Iranian leadership concludes that it has little left to lose, she may seek to impose prolonged economic pain on her adversaries by sustaining a campaign against maritime commerce.

Most analysts expect disruption measured in months rather than years. Iran’s ability to maintain constant attacks is limited by her stockpiles of missiles and drones, by the vulnerability of her coastal infrastructure to air strikes and by the economic damage that a prolonged closure would inflict upon her own exports.

Indeed Iran depends on the Strait as much as her adversaries do. Her own oil exports to China must pass through the same narrow corridor, making a permanent closure strategically self-destructive. 

Historical precedents

The most relevant historical parallel is the so-called Tanker War of the 1980s during the Iran–Iraq War. In that conflict both sides attacked oil tankers in the Gulf, prompting the United States and other powers to organise naval escorts for commercial vessels.

Those convoys ultimately succeeded in maintaining maritime traffic, but only after numerous ships had been damaged and several had sunk. Mines, missiles and small craft proved capable of inflicting considerable disruption even against heavily protected convoys.

The lesson of the Tanker War is that maritime commerce in such circumstances can continue but never normally. Shipping becomes slower, more expensive and heavily militarised.

The economic consequences

The immediate economic effects of the current crisis have already been dramatic. Energy infrastructure across the Gulf has suffered damage from missile and drone strikes, and oil prices have surged sharply as markets anticipate supply disruptions. 

Even temporary disruptions in the Strait reverberate through global markets because the Gulf states export vast volumes of crude oil and liquefied natural gas through this route. A sustained conflict would therefore threaten global inflation and could easily trigger recession in energy-dependent economies.

Can safe passage ultimately be restored?

In the long term the answer is almost certainly yes. The combined naval power of the United States and her allies far exceeds anything Iran can deploy at sea. If necessary the coalition could systematically destroy Iranian coastal missile batteries, naval bases and drone launch sites.

Yet this superiority does not eliminate the danger. Iran does not need to defeat Western navies; she needs only to create enough risk that insurers refuse to cover shipping and tanker captains refuse to enter the Gulf. In such circumstances the Strait can be closed economically even if it remains open militarily.

The most likely outcome therefore resembles an uneasy compromise. Convoy systems will eventually reopen the passage, but at greatly increased cost and with continuing sporadic attacks.

The Strait of Hormuz will not become a permanently sealed barrier. But neither will it return quickly to the routine tranquillity that global commerce once took for granted.

In the weeks ahead, therefore, the battle for Hormuz will not resemble a decisive naval engagement in the classical sense. Instead it will unfold as a prolonged contest between asymmetric disruption and industrial-scale naval protection. It is a struggle not for conquest of territory but for the simple right of ships to pass through one of the most contested waterways on Earth.