The Fragile Ceasefire: Gulf Security at a Crossroads as the Iran-US War Enters a Dangerous New Phase

The ceasefire between the United States and Iran, signed on April 8, 2026 after six weeks of the most devastating Middle Eastern conflict in decades, is now barely clinging to life. In the thirty-five days since the agreement was supposed to halt hostilities, Iranian missiles and drones have continued to strike targets across the Gulf, the Strait of Hormuz has remained effectively closed to commercial shipping, and the diplomatic track has produced little more than mutual recrimination. As of May 12 — Day 74 since Operation Epic Fury began on February 28 — President Donald Trump himself has described the ceasefire as being "on massive life support," while Iran’s new Supreme Leader Mojtaba Khamenei has vowed that Tehran will "never bow" to American demands.

The war’s opening phase was brutal and swift. On February 28, 2026, the United States and Israel launched coordinated airstrikes — codenamed Operation Epic Fury and Operation Roaring Lion respectively — against Iranian military installations, nuclear enrichment facilities, and senior leadership. Among the casualties in the opening hours was Supreme Leader Ali Khamenei, whose death fundamentally altered Iran’s command structure and placed his son Mojtaba at the helm of a regime fighting for its survival. Within forty-eight hours, Iran had retaliated under Operation True Promise IV, extending the war’s geographic footprint to seven countries: Bahrain, Jordan, Kuwait, Qatar, Saudi Arabia, the United Arab Emirates, and Iraq. The two-month campaign cost the United States an estimated $25 billion, depleted critical munition stockpiles at rates that analysts assessed would take three to five years to rebuild, and produced what the International Energy Agency described as the largest oil supply disruption in the history of global markets.

It is the Strait of Hormuz, however, that has emerged as the conflict’s strategic centre of gravity. Iran has effectively sealed the waterway since the war’s opening days, blocking the passage of roughly 20 million barrels of oil and petroleum products that ordinarily transit the strait each day. In response, the United States imposed its own naval blockade of Iranian ports, and on May 7, U.S. guided-missile destroyers transiting the strait came under attack from Iranian missiles, drones, and small boats. American forces responded by striking Iranian military facilities in the strait and, on May 9, disabled two Iranian oil tankers attempting to breach the blockade by using fighter jets to strike their smokestacks — a tactic employed earlier in the week against another tanker whose rudder was shot out. The cumulative toll of these exchanges has been serious: ten civilian sailors have been killed in Hormuz incidents since the ceasefire was declared.

The most alarming development in the strait has been Iran’s creation of the Persian Gulf Strait Authority, a government agency that now vets and taxes vessels seeking passage through the waterway. Secretary of State Marco Rubio described this as "unacceptable" and posed the question that lies at the heart of the current crisis: "Is the world going to accept that Iran now controls an international waterway? What is the world prepared to do about it?" The answer remains unclear. While the United States announced on May 4 that it would begin escorting commercial ships through the strait, the operational reality is that hundreds of commercial vessels remain bottled up in the Persian Gulf, unable to reach open sea. A Qatari LNG tanker managed to cross the strait on May 11 with IRGC permission — the first such transit since the war began — but this appears to have been a calculated Iranian gesture rather than a meaningful reopening.

The human and physical toll on the Gulf states has been unprecedented. The United Arab Emirates has emerged as the conflict’s most consistently targeted secondary theatre. Between February 28 and March 8 alone, the UAE reported 1,422 detected drones and 246 missiles crossing its territory. In the first week of May, a new round of Iranian attacks struck multiple emirates, with missiles targeting Dubai, Abu Dhabi, and the strategic Port of Fujairah — the UAE’s critical oil export terminal on the Gulf of Oman that allows shipments to bypass the Strait of Hormuz entirely, handling approximately 1.7 million barrels per day. A drone strike on the Fujairah refinery complex triggered a major fire, wounding three Indian nationals working at the facility and forcing a temporary suspension of operations that reduced UAE oil production by an estimated 500,000 to 800,000 barrels per day. In Dubai, air raid sirens activated across the city and residents were instructed to take shelter as Patriot and THAAD systems engaged incoming threats overhead — a psychological shock for a population that has long viewed the emirates as one of the safest places on earth. The Ministry of Education shifted all schools to remote learning for the week, a stark reminder that this conflict has penetrated every layer of civilian life.

The cost asymmetry between Iranian offensive systems and Western defensive interceptors has been the war’s most widely discussed tactical revelation. In the first four days of combat alone, U.S. Patriot batteries fired 943 interceptors — equivalent to eighteen months of combined Lockheed Martin and Boeing production output. GCC states collectively burned through approximately 86 percent of their combined pre-war Patriot-family inventory of roughly 2,800 rounds within five weeks, according to analysis by the Jewish Institute for National Security of America. THAAD batteries expended approximately 198 interceptors in the first sixteen days, representing roughly 40 percent of the entire U.S. global inventory of 534 rounds, with assessments suggesting 40 to 80 percent of all THAAD interceptors were ultimately expended over the full campaign. The numbers are devastating in their simplicity: a Shahed-136 drone costs between $20,000 and $50,000 to produce, while a single PAC-3 MSE interceptor costs $3.7 to $4 million — a ratio of 114-to-1 in Iran’s favour. CSIS titled its ceasefire assessment "Last Rounds?" — a pointed reference to how deeply the campaign drained strategic reserves that also underpin Pacific deterrence against China.

Diplomatically, the picture is equally bleak. The United States has insisted the ceasefire remains in effect, but Washington’s rejection of Iran’s latest peace counterproposal as "garbage" — Trump’s word — has not helped. Iran’s Foreign Minister Abbas Araghchi has repeatedly condemned what he calls "hostile" U.S. military actions as ceasefire violations, declaring after the May 9 Hormuz engagement that "every time a diplomatic solution is on the table, the U.S. opts for a reckless military adventure." Pakistan has positioned itself as an intermediary, with Prime Minister Shehbaz Sharif confirming that Islamabad is in contact with both Washington and Tehran "day and night" in an effort to extend the ceasefire and broker a lasting peace. But the gap between the two sides remains vast: Washington demands the full reopening of the strait and a rollback of Iran’s nuclear programme, while Tehran insists on the lifting of the U.S. blockade and an end to strikes on its territory before any substantive concessions.

Adding to the complexity is the environmental catastrophe unfolding in the Gulf. Satellite imagery reviewed by the Associated Press has revealed a massive oil slick emanating from Kharg Island, Iran’s main crude export terminal, covering approximately 71 square kilometres. Maritime intelligence firm Windward AI estimates that the equivalent of roughly 80,000 barrels of oil has spilled since the slick was first detected on May 6. It remains unclear whether the spill was caused by a malfunction, an airstrike, or some other factor, but the Pentagon has declined to comment on whether U.S. forces were tracking the spill or whether recent strikes had targeted the island. Preliminary assessments suggest the slick is dispersing offshore and may not reach land, but the incident underscores the profound environmental risks of fighting a major conventional conflict in one of the world’s most ecologically sensitive and economically vital maritime zones.

Looking ahead, the Gulf states find themselves navigating an extraordinarily precarious strategic landscape. The United States has approved $16.5 billion in emergency arms sales to Gulf allies — including drones, missiles, radar systems, and F-16 aircraft for the UAE, and advanced air and missile defence radars for Kuwait — bypassing the usual congressional review process on grounds of an "emergency that requires the immediate sale." Separately, a $9 billion Foreign Military Sale of Patriot Advanced Capability-3 Missile Segment Enhancement missiles to Saudi Arabia was approved on January 30. These sales are a recognition that the existing Gulf air defence architecture proved dangerously vulnerable to saturation attack. Meanwhile, Ukraine has signed ten-year defence cooperation agreements with Saudi Arabia, Qatar, and the UAE during President Zelenskyy’s March 2026 tour of the region, providing Gulf states with access to Ukraine’s complete air defence ecosystem — including maritime drones, electronic warfare capabilities, and interception technology honed against Iranian-designed drones over three years of war with Russia.

The path forward remains deeply uncertain. Trump has explicitly threatened to resume full-scale bombing if Iran does not accept an agreement to reopen the strait and roll back its nuclear programme — a demand made more urgent by the IAEA’s disclosure that Iran’s stockpile of 60-percent-enriched uranium has reached 440.9 kilogrammes, with the Natanz enrichment facility approximately 75 percent damaged and Fordow approximately 30 percent damaged. Brent crude, which breached $100 per barrel on March 13 and surged past $114 in late March before settling, remains near $104 as markets price in the near-total disruption of Hormuz transit that shows no sign of resolution. Saudi Aramco’s CEO has warned that normalisation of energy markets is not expected before next year. For the Gulf states — caught between an Iran that has proven its ability to strike at will across the region and an American superpower whose commitment to their defence is being tested in ways not seen since the 1991 Gulf War — the choices ahead will define their security posture for a generation.