Six months after the United States and Israel went to war against Iran, an extraordinary exchange of fire around the Strait of Hormuz has exposed one of the most important unanswered questions of the conflict.

The United States struck Iranian positions on Larak Island, strategically located in the Strait of Hormuz, saying Iranian forces were preparing rockets carrying sea mines that could threaten international shipping.

Iran responded by firing ballistic missiles towards US military facilities in Jordan.

The missiles were intercepted and the immediate military damage appears to have been limited.

But the significance lies elsewhere.

After six months in which the world's most powerful military, together with Israel, has attacked Iran's nuclear, missile, military and industrial infrastructure, Iran can still launch ballistic missiles.

It can still deploy drones.

It can still threaten shipping.

And, most importantly for the world economy, it can still make passage through the Strait of Hormuz dangerous.

That raises a question which is becoming more important than the daily exchange of missiles:

What has the war actually achieved?

How the war began

The present war began on February 28, 2026, when the United States and Israel launched major attacks against Iran.

The initial objectives were ambitious.

Iran's nuclear capabilities were to be destroyed or severely degraded.

Its ballistic missile capability was to be reduced.

Its ability to project military power across the Middle East was to be curtailed.

The network of Iranian-backed forces and organisations operating around the region was to be weakened.

There was also an expectation that overwhelming military pressure might fundamentally alter the behaviour — and potentially the leadership — of the Iranian state.

The military imbalance appeared enormous.

The United States possesses the world's most sophisticated conventional military capability.

Israel possesses one of the world's most capable air forces and intelligence establishments.

Iran is economically and militarily much smaller.

On paper, it looked profoundly unequal.

Six months later, it is clear that size alone does not determine the outcome of this kind of war.

Iran has suffered enormous damage

It would be wrong to conclude from Iran's continuing missile launches that the American and Israeli campaign has failed militarily.

Iran has suffered extensive damage.

Military installations have been attacked.

Air-defence systems have been degraded.

Missile launchers and missile-production infrastructure have been targeted.

Nuclear facilities have been attacked.

Senior Iranian leaders and military commanders have been killed.

Iran's conventional military capabilities have been substantially reduced.

The intensity of Iranian missile attacks has also fallen dramatically from periods earlier in the conflict.

These are significant military achievements.

But degrading an adversary is different from eliminating its ability to fight.

That distinction may explain much of what we are now seeing.

Why can Iran still fire missiles?

A ballistic missile force does not need enormous numbers of launchers to remain strategically important.

Iran spent decades preparing for precisely the kind of conflict it is now fighting.

Missiles were dispersed.

Some were stored underground.

Launch systems were made mobile.

Production facilities were distributed.

Drones provided another relatively inexpensive method of attack.

Iran therefore does not need to match American military power.

It merely needs to preserve enough weapons to continue imposing costs.

A country can lose much of its military capability and still retain the ability to fire a handful of missiles.

Those missiles do not necessarily have to penetrate sophisticated American air defences to achieve a strategic purpose.

Their existence forces opponents to maintain expensive defensive systems.

They threaten airfields and military installations.

They disrupt civilian aviation.

They increase insurance costs.

They affect investment.

And every missile exchange reminds shipping companies that the Persian Gulf remains a war zone.

This is asymmetric warfare.

Iran cannot defeat the United States in a conventional military contest.

It does not have to.

Geography gives Iran an extraordinary weapon

Iran possesses something the United States cannot destroy with an air strike.

Geography.

The Strait of Hormuz is the narrow entrance to the Persian Gulf.

Before the war, roughly one-fifth of the world's petroleum liquids moved through this comparatively narrow maritime corridor.

Saudi Arabia, the United Arab Emirates, Kuwait, Iraq and other Gulf producers depend heavily upon it.

So does Iran itself.

That gives Tehran an unusual form of strategic leverage.

Iran does not necessarily have to close Hormuz completely.

It merely has to make using it sufficiently dangerous.

Mines can do that.

Anti-ship missiles can do it.

Drones can do it.

Attacks on individual tankers can do it.

Even the credible threat of attack can affect the calculations of shipowners, crews and insurers.

A tanker travelling safely through Hormuz is useful to the world economy.

A tanker sitting outside the Gulf because its owner will not accept the risk is not.

This is why the recent American strike on Larak Island matters.

The United States said Iranian forces there were preparing weapons associated with another potential mining operation.

Iran retaliated.

Whatever happens next, the episode demonstrates that control of Hormuz has become one of the central contests of the war.

The war aims have changed

This is perhaps the most revealing development after six months.

The conflict began principally around Iran's nuclear programme, missile capability and regional military influence.

Hormuz has progressively moved towards the centre of the confrontation.

America now faces a difficult strategic problem.

It can destroy Iranian missile launchers.

It can attack naval facilities.

It can clear mines.

It can escort shipping.

But permanently guaranteeing freedom of navigation through a waterway running beside Iran is much harder.

Iran can wait.

Then another mine can appear.

Another launcher can be moved.

Another drone can be deployed.

Another tanker can be threatened.

Military superiority therefore does not automatically produce commercial normality.

Has America won?

There is no simple answer.

If victory means severely degrading Iran's military infrastructure, substantial objectives have been achieved.

If victory means preventing Iran from conducting military operations beyond its borders, that objective has plainly not been completely achieved.

If victory means ensuring permanently safe navigation through Hormuz, it has not yet been achieved.

And if victory means removing Iran's ability to threaten its neighbours indefinitely, six months of war demonstrates how difficult that objective would be to accomplish through bombing alone.

This does not mean additional military operations cannot further reduce Iranian capability.

They can.

The harder question is what happens afterwards.

Missiles can eventually be rebuilt.

Drones can be manufactured.

Mines are comparatively inexpensive.

New military commanders replace dead commanders.

Infrastructure can be reconstructed.

Unless something changes politically, military degradation can become a cycle rather than a conclusion.

What would actually end the Iranian threat?

There is probably no military operation capable of guaranteeing that Iran will never again possess missiles, drones or mines.

The more realistic objective is to create circumstances in which Iran either cannot use those capabilities effectively or concludes that using them is not in its interests.

That could eventually require several elements.

Iran's nuclear programme would need credible monitoring and verification.

Restrictions on ballistic missile development could become part of a broader settlement.

Freedom of navigation through Hormuz would need to be guaranteed.

The Gulf states would need sufficient confidence that their territory and energy infrastructure were secure.

Iran would need incentives to participate in normal international trade.

And there would have to be consequences sufficiently credible to discourage renewed attacks.

Military power may create the conditions for such an agreement.

It cannot by itself create the agreement.

That is ultimately the difference between defeating military assets and resolving a conflict.

There is another measure of success: the price paid by everyone else

The war has produced consequences far beyond Iran, Israel and the United States.

Oil markets have been disrupted.

Refining capacity has been damaged.

Tankers have been attacked.

Shipping insurance has become more expensive.

Aircraft have been rerouted.

Trade patterns have changed.

Governments have intervened in energy markets.

Businesses thousands of kilometres from the battlefield have paid higher transport and energy costs.

Australia is among them.

That is why events around a small Iranian island matter to Australians.

Australia does not buy petrol directly from an oil well

Understanding when Australian fuel prices might fall requires an important distinction.

Brent crude is not the price Australians pay for petrol.

Australia's petrol prices are strongly influenced by the Singapore Mogas 95 refined-petrol benchmark.

Australian diesel prices are strongly influenced by Singapore Gasoil 10 ppm.

The Australian dollar also matters because petroleum products are traded internationally in US dollars.

That means three things can happen simultaneously.

World crude prices can fall.

Australian petrol prices can remain high.

And Australian diesel prices can behave differently again.

The war has damaged and disrupted parts of the international refining system as well as crude-oil transportation.

For Australia, therefore, reopening Hormuz is only the first step.

When will Australian fuel prices fall?

There is no date anyone can responsibly nominate.

The sequence is more important than the calendar.

First, the military risk around Hormuz must decline.

Then tanker movements must become consistently reliable.

Insurance premiums and freight costs must normalise.

Crude supply must reach refineries reliably.

Refined petrol, diesel and aviation-fuel markets in Asia must settle.

Singapore benchmark prices must fall.

The Australian dollar will influence how much of that improvement reaches Australia.

Only then does the change work through Australian wholesalers and retailers.

The ACCC says movements in international benchmark prices generally take around two weeks to work through the supply chain in Australian cities.

Regional areas can take longer.

Australians should therefore be sceptical of claims that a ceasefire on Monday automatically means dramatically cheaper petrol on Tuesday.

The physical supply chain does not operate that quickly.

Fuel excise relief has ended

There is another reason Australians should not expect petrol automatically to return to the prices seen when temporary government assistance was operating.

The temporary reduction in Commonwealth fuel excise introduced during the crisis has ended.

The original package reduced the effective burden by 32 cents a litre from April before assistance was tapered.

The remaining temporary reduction ended on August 2.

Future pump prices therefore need to be compared carefully.

A fall in the underlying international fuel price does not necessarily produce an equivalent fall in the amount motorists pay compared with periods when temporary tax relief was operating.

Australia has fuel

This distinction remains important.

Australia is not presently confronting an empty-tank crisis.

Government figures have continued to show substantial holdings of petrol, diesel and aviation fuel, and Australia remains at Level 2 — “Keep Australia Moving” — under the four-level National Fuel Security Plan.

Industry stocks have also been running above minimum stockholding requirements.

That does not mean Australia could simply stop importing petroleum products for the quoted number of “days of supply” and continue operating normally until a clock reached zero.

The figures are measures of stocks relative to normal consumption.

The Australian petroleum system remains dependent upon functioning international supply chains.

Our immediate vulnerability is therefore less dramatic than “Australia is running out of fuel.”

It is also more persistent.

Australia needs the international fuel system to work efficiently.

Diesel deserves particular attention

Petrol attracts enormous public attention because motorists see its price displayed beside almost every major road.

Diesel is arguably more important to the productive economy.

Trucks use it.

Mining equipment uses it.

Farm machinery uses it.

Construction equipment uses it.

Regional businesses depend upon it.

When diesel becomes expensive, the cost does not remain at the service station.

It enters freight bills.

Then food prices.

Building costs.

Mining costs.

Agricultural production.

Retail distribution.

Eventually it can appear in inflation.

The economic consequences of Hormuz therefore extend much further than the family car.

Aviation has the same problem

Jet fuel provides another transmission mechanism.

Australia is geographically isolated.

Domestic aviation distances are large.

International tourism depends heavily upon long-haul aviation.

Higher aviation-fuel costs eventually have to be absorbed somewhere — by airlines, passengers, shareholders or some combination of them.

The consequences can flow into tourism, accommodation and regional economies.

Again, the battlefield may be thousands of kilometres away.

The economic transmission mechanism is not.

When will trade return to normal?

Probably later than the politicians declare the war over.

Commercial normality requires confidence.

A shipping company does not send a tanker carrying a cargo worth tens of millions of dollars through a recently mined waterway simply because political leaders announce progress.

Insurers need evidence.

Shipowners need evidence.

Crews need confidence.

Commodity traders need confidence.

Ports and refineries need predictable delivery schedules.

One safe day is not enough.

Nor is one busy day of tanker movements.

A genuine recovery would look boring.

Ships would transit Hormuz routinely.

Insurance premiums would fall.

Tankers would stop switching off tracking systems to conceal movements.

War-risk surcharges would decline.

Refinery supply chains would become predictable.

Oil-price volatility would diminish.

Only then could we reasonably say that trade was approaching normal.

Australia is already responding to the lesson

The Australian Government's response indicates that Canberra understands the strategic implications.

Australia remains at Level 2 of the National Fuel Security Plan.

The government has also announced a $14.8 billion Fuel Security and Resilience Package, including work towards greater strategic reserves and stronger domestic fuel resilience.

That is significant.

The Iran war has demonstrated that Australia's fuel-security problem is not simply about how much petroleum exists underground somewhere in the world.

It is about whether crude can reach refineries.

Whether refineries can produce enough fuel.

Whether tankers can sail.

Whether insurers will cover them.

Whether ports remain accessible.

And whether Australia can obtain the refined products upon which a modern economy depends.

Six months have changed the question

At the beginning of the war, the question was whether overwhelming American and Israeli military power could rapidly neutralise Iran's military capabilities.

Six months later, the better question is different.

How much Iranian capability must be destroyed before Iran can no longer impose unacceptable costs on everyone else?

The latest exchange around Larak Island provides an uncomfortable answer.

A great deal of Iranian military capability has apparently been destroyed.

But enough remains.

Enough to fire missiles.

Enough to deploy drones.

Enough to threaten mines.

Enough to frighten tanker operators.

And enough to move the international price of oil.

That does not make Iran militarily equal to the United States.

It demonstrates something quite different.

A weaker country occupying strategically important geography does not have to defeat a superpower to cause enormous economic disruption.

The Times View

After six months, it would be premature either to declare the American-Israeli campaign a failure or to call it a victory.

Iran has suffered extraordinary military damage.

But the latest exchange demonstrates that military degradation has not produced strategic resolution.

The United States can destroy a missile launcher.

The more difficult task is creating circumstances in which another launcher does not replace it.

It can clear a shipping channel.

The harder task is ensuring nobody mines it again.

And it can destroy military infrastructure.

The hardest task of all is changing the behaviour that caused the conflict.

For Australia, that distinction matters.

We should not measure the end of this war by the final missile fired.

We should measure it by the return of something far less dramatic: tankers quietly sailing through Hormuz, refineries receiving predictable supplies, international fuel benchmarks falling, aircraft operating normally and Australian businesses no longer paying a war premium.

That is when the Iran war will really begin to end for Australia.