Washington says five Iranian oil tankers were destroyed after Revolutionary Guard missile attacks on a US Navy vessel, while Tehran responded with strikes on an American base in Jordan and claimed further attacks on ships near the Strait of Hormuz.

The confrontation between the United States and Iran has entered another dangerous phase after American forces struck five Iranian oil tankers and Tehran retaliated with ballistic missile attacks against a US military installation in Jordan, shattering a period of relative calm and raising fears of a wider regional escalation.

US Central Command said American forces attacked the tankers on Tuesday after Iran’s Islamic Revolutionary Guard Corps twice attempted to strike a US Navy warship with ballistic missiles over a two-day period. According to Washington, the vessel successfully evaded both attacks and no American personnel were injured.

The United States said four of the tankers — the Kaviz, Charminar, Horizon 1 and Riesco — were attacked in the Gulf of Oman, while a fifth vessel, the Derya, was struck near Kharg Island, home to Iran’s most important crude-export infrastructure. US officials said the crews were instructed to abandon the ships before the attacks began.

The strikes represented one of the clearest attempts yet by Washington to impose direct economic costs on Iran’s energy sector in response to attacks on American military assets. They also widened the battlefield from naval and military targets to commercial energy infrastructure at a time when the security of oil shipments through the Gulf is already under intense pressure.

Tehran responded within hours.

Iran’s Revolutionary Guards announced that ballistic missiles had been fired at the Al Azraq base in Jordan, which is used by American forces. Jordan’s military said its air defences confronted 20 ballistic missiles, intercepting 18, while two fell in unpopulated areas. No casualties were reported.

The sequence of attacks has reignited concerns that the six-month conflict between the United States and Iran is becoming increasingly difficult to contain.

Tankers Become Part of the Battlefield

The destruction of oil tankers marks a significant escalation because Iran’s energy-export infrastructure has long represented one of the country’s most strategically sensitive assets.

Kharg Island is particularly important. Before the current conflict, the terminal handled the overwhelming majority of Iran’s seaborne crude exports, making it central to Tehran’s ability to earn foreign currency and finance government operations. Iranian state media confirmed that a tanker near the island had been hit and reported additional strikes close to the southern port of Jask.

CENTCOM later released footage that it said showed the Riesco sinking in the Gulf of Oman. Iran confirmed that crews had been evacuated from at least some of the affected vessels.

The attacks followed similar American action on 5 September, when US forces struck three Iranian tankers after missile attacks on American naval vessels. At the time, CENTCOM commander Admiral Brad Cooper warned that attacks against US ships would produce increasingly severe economic consequences for Tehran.

The latest operation therefore suggests that Washington is developing a pattern of retaliatory strikes designed to target Iran’s oil-export capacity whenever American naval forces come under attack.

That strategy carries substantial risks.

Iran has repeatedly warned that attacks on its energy infrastructure could provoke strikes against US military facilities, shipping lanes and regional energy installations. Iranian military officials had specifically warned that American bases across the Middle East could be targeted if Iranian tankers were attacked.

Tehran Expands Its Response

The strike on Jordan may not have been Iran’s only response.

The IRGC also claimed it had attacked two American vessels and eight tankers elsewhere in the region, although those assertions were not immediately independently verified. It separately claimed attacks on the US Navy destroyers DDG-119 and DDG-53, saying they had suffered significant damage. Washington had not confirmed those claims at the time of reporting.

That distinction is important.

Both sides are now releasing military statements at high speed, often before independent confirmation can be obtained. Claims of damage, interception rates and successful targeting therefore need to be treated cautiously unless supported by satellite imagery, independent maritime reporting or acknowledgement from the opposing side.

What is clear is that the geography of the confrontation is widening.

The conflict is no longer confined to Iranian territory or naval encounters near the Strait of Hormuz. US facilities in Jordan have now come under direct missile attack, while energy infrastructure and commercial shipping across the Gulf of Oman are increasingly being drawn into the conflict.

The Strait of Hormuz at the Centre of the Crisis

Behind the immediate exchange of strikes lies a much larger strategic contest over the Strait of Hormuz.

The narrow waterway linking the Persian Gulf with the Gulf of Oman is one of the most important energy corridors in the world. A substantial share of global oil and liquefied natural gas exports normally passes through the strait, meaning any sustained disruption can affect energy prices far beyond the Middle East.

Iran has sought to exploit that vulnerability throughout the conflict.

Tehran has threatened exclusion zones and attacks against vessels operating in waters it considers part of the battlefield, while Washington has attempted to maintain maritime transit routes and protect commercial shipping near Oman.

The latest violence has already affected markets.

Oil prices moved towards $100 a barrel following the tanker attacks and subsequent Iranian retaliation, reflecting fears that further escalation could restrict exports from the Gulf or force shipping companies to avoid the region.

The economic consequences could become severe if hostilities continue.

A prolonged disruption around Hormuz would place upward pressure on fuel prices, shipping insurance costs and transportation expenses, potentially feeding inflation across Europe and Asia at a time when many economies remain sensitive to energy-price volatility.

Jordan Faces a Growing Security Dilemma

Iran’s decision to target Al Azraq also places Jordan in an increasingly difficult position.

Amman is a close US security partner and hosts American military personnel, but it has consistently sought to avoid becoming a direct battlefield in conflicts involving Israel, Iran and the United States.

The interception of Iranian ballistic missiles over Jordanian territory illustrates how difficult maintaining that position has become.

Jordanian forces said 18 of the 20 missiles directed towards the kingdom were destroyed, while the remaining two landed in uninhabited areas. Specialized teams were sent to secure locations where missile debris fell.

Even without casualties, repeated attacks could intensify domestic and regional pressure on the Jordanian government.

Any significant damage to American facilities inside Jordan could also trigger additional US retaliation, potentially creating another cycle of attacks extending beyond the Gulf.

A Month of Relative Calm Ends Abruptly

The renewed violence is especially significant because it follows several weeks of comparatively reduced military activity.

Reuters reported that the latest exchanges have ended roughly a month of relative calm during a conflict that has already lasted six months. The renewed strikes have targeted military installations, shipping and energy assets almost simultaneously.

The pattern suggests that neither side has found a reliable mechanism for preventing tactical encounters from escalating.

A missile launch against a ship leads to attacks on tankers. Those strikes trigger ballistic missile retaliation against a regional US base. Further attacks on shipping are then threatened or claimed.

Each individual action may be framed by the side carrying it out as proportionate retaliation. Collectively, however, they create an escalation ladder in which the number and value of targets continue to increase.

That dynamic is becoming one of the greatest dangers of the conflict.

Energy Infrastructure as Strategic Leverage

Iran’s oil industry is particularly vulnerable because much of its export infrastructure is geographically concentrated.

Kharg Island, offshore terminals and a relatively limited number of tanker routes provide obvious targets for a technologically superior US military.

Washington therefore has the ability to impose severe economic costs without immediately launching strikes deep inside densely populated Iranian territory.

But that advantage could produce its own form of escalation.

Iran lacks the same conventional naval and air power as the United States, but it possesses large inventories of ballistic missiles, drones and anti-ship weapons. It can also threaten military installations distributed across several Gulf states.

This asymmetry creates a dangerous strategic equation: the United States can attack Iranian energy assets, while Tehran can attempt to retaliate against a much broader network of American bases and commercial maritime traffic.

Neither side necessarily needs to seek a full-scale regional war for such a war to emerge.

Regional Allies Face Increasing Exposure

The confrontation also places US partners across the Middle East under growing pressure.

American military facilities are distributed across Jordan, Bahrain, Qatar, Kuwait, Saudi Arabia, the United Arab Emirates and other locations. Any Iranian decision to treat those installations as legitimate retaliatory targets could pull additional governments directly into the conflict.

At the same time, attacks on commercial shipping create risks for countries that are not directly participating in hostilities.

South Korea and France have already discussed additional maritime-security cooperation as governments assess how to protect vessels transiting the region. Seoul has also sent an inspection team to the United Arab Emirates while stressing that no immediate military deployment had been decided.

The concern is not only physical damage.

Insurance premiums, crew availability, rerouting costs and uncertainty over access to ports can disrupt global trade even when most ships continue to move safely.

A Conflict Increasingly Difficult to Control

The latest exchange illustrates the central problem facing Washington and Tehran: every attempt to establish deterrence risks producing precisely the escalation both sides say they want to avoid.

The United States describes its tanker attacks as retaliation intended to discourage further strikes against American forces.

Iran describes its missile attacks as a necessary response designed to impose costs on Washington and deter attacks on Iranian assets.

Both narratives rely on the same logic.

And both can therefore sustain an almost indefinite cycle of escalation.

The immediate military balance remains heavily in Washington’s favour. The United States possesses far greater naval, air and intelligence capabilities and can strike Iranian infrastructure at considerable range.

But Iran retains enough missiles, drones and regional reach to make further escalation expensive and unpredictable.

The strategic danger lies in the possibility that the next round produces casualties.

So far, the most recent attacks on the US warship and the American base in Jordan have not resulted in confirmed American deaths. The crews of the Iranian tankers were reportedly warned to evacuate before the vessels were struck.

That has left both sides some room to calibrate their responses.

A successful missile strike on a US naval vessel, a mass-casualty attack on an American base or the destruction of a major Iranian energy facility could quickly remove that margin.

For now, the Gulf has returned to a familiar but increasingly dangerous pattern: attack, retaliation and renewed threats.

The difference is that each cycle is reaching further into the region’s military and economic infrastructure.

If that trajectory continues, the question may soon shift from whether Washington and Tehran can deter one another to whether either side can still control the conflict they are creating.