The Drone Strait

Why Iran Doesn’t Need to Win the War to Win the War

Credit to Phillips O’Brien being interviewed by Paul Krugman.

When the United States and Israel launched their strikes against Iran, the assumption in many Western capitals was simple: overwhelming air power would decide the conflict.

In purely military terms, that assumption was not entirely wrong.

The United States and Israel possess two of the most capable air forces on earth. They can strike almost any visible target inside Iran. Air defences have been degraded, command centres hit, and infrastructure damaged.

But as military historian Phillips O’Brien argues, air supremacy does not automatically translate into strategic control. And the war now unfolding in the Persian Gulf is exposing a transformation in how modern conflicts are fought.

Iran does not need to defeat the United States militarily.
It only needs to make the war economically unbearable.

The Geography of Leverage

The strategic centre of gravity is not Tehran.

It is the Strait of Hormuz.

Roughly one-fifth of the world’s oil supply passes through the narrow waterway connecting the Persian Gulf to the Indian Ocean. The strait is only about thirty kilometres wide at its narrowest point.

More importantly, Iran controls the entire northern coastline.

This geography gives Tehran a decisive asymmetric advantage. Tankers moving through the Gulf are enormous, slow, and almost completely unprotected. Unlike naval vessels, civilian ships cannot manoeuvre quickly or defend themselves against aerial threats.

A single inexpensive drone can disrupt a vessel worth hundreds of millions of dollars.

And disruption is all Iran needs.

Insurance costs spike. Shipping companies withdraw. Energy markets panic.

The strategic effect cascades across the global economy.

The Strait of Hormuz carries roughly a fifth of the world’s oil supply. Its narrow waters place global energy flows within easy reach of Iranian drone and missile forces.

The $30,000 Problem

The heart of the problem lies in the economics of modern warfare.

Iranian drones are cheap.

Many variants cost between $30,000 and $50,000 to produce.

To destroy them, the United States often relies on advanced air-defence systems such as Patriot interceptors costing millions of dollars per shot.

This creates a brutal cost imbalance.

A $30,000 drone forcing a $3 million missile launch is not just warfare — it is economic exhaustion by design.

Even if the United States successfully intercepts every incoming drone, it loses economically with each engagement. The defender spends far more than the attacker.

Ukraine confronted exactly the same dilemma.

Rather than relying solely on expensive Western systems, Ukrainian engineers developed anti-drone drones costing only a few thousand dollars. These systems hunt and destroy hostile drones at a fraction of the cost.

It is one of the most important technological adaptations of the war in Ukraine.

And it illustrates a broader shift.

Industrial warfare is returning — but this time with autonomous systems.

Iran’s Shahed-type drones are inexpensive, mass-produced weapons designed to exhaust expensive air-defence systems.

The End of Classical Air Supremacy

For decades, American military doctrine assumed that air power would follow a predictable sequence.

First, neutralise enemy air defences.
Second, destroy enemy aircraft.
Third, dominate the battlespace.

That model worked in Iraq in 1991. It worked again in 2003.

But drones are breaking that paradigm.

Unlike fighter aircraft, drones do not require major air bases. They can be launched from small trucks, temporary pads, or even civilian locations. They are easy to disperse and difficult to detect.

Destroying every launch platform becomes a needle-in-a-haystack problem.

As O’Brien notes, the result may be a new equilibrium in warfare: both sides retain the ability to strike, even when one side clearly dominates the skies.

Air superiority no longer guarantees safety.

The Gulf as a Permanent Kill Zone

If drones can reach tankers anywhere in the Gulf, there is effectively no safe shipping lane.

This creates a strategic situation reminiscent of the “kill zones” now seen on the battlefields of Ukraine.

But instead of tanks and infantry, the targets are oil tankers.

In the Persian Gulf, the question is no longer who controls the skies.
The question is who can afford the drones.

The economic consequences could be immense.

Oil prices have already surged. Fertiliser exports from the Gulf — crucial for global agriculture — are under threat. Even helium shipments, vital for semiconductor manufacturing, could be disrupted.

In other words, a regional conflict risks becoming a global economic shock.

Large tankers moving through the Gulf are slow, exposed targets — ideal for drone and missile attacks.

The Strategic Trap

The United States now faces an uncomfortable dilemma.

Continuing the air campaign alone will not reopen shipping lanes. Tanker operators will not risk vessels worth hundreds of millions of dollars if even a handful of drones remain active.

Two options remain.

The first is de-escalation: negotiating some form of ceasefire that restores shipping through Hormuz.

The second would be far more dangerous — deploying ground forces along parts of the Iranian coastline to physically secure maritime routes.

Such an operation would require major troop deployments, logistics hubs, and sustained combat operations.

It would also risk a wider regional war.

Neither option was clearly prepared in advance.

The War That Strengthens Moscow

There is another strategic irony.

Rising oil prices benefit Russia.

Higher energy revenues strengthen the Kremlin’s war economy at the very moment Western aid to Ukraine has slowed. According to some estimates, the surge in oil prices could be adding over $100 million per day to Russian revenues.

A conflict intended to weaken Iran may therefore be indirectly strengthening Moscow.

And Beijing, meanwhile, continues purchasing Iranian oil.

The Future of War

What is emerging in the Gulf may represent the next phase of modern warfare.

Cheap drones.
Distributed launch systems.
Persistent long-range strikes.

In this environment, technological superiority alone is no longer decisive.

Mass production matters. Cost efficiency matters. Geography matters.

And sometimes the weaker power does not need to win battles.

It only needs to make victory impossible.

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