Iran's Unprecedented Retaliation: Missile Strikes and Hormuz Near-Closure

Operation Epic Fury, launched by the United States and Israel on February 28, 2026, targeted the full architecture of Iran's nuclear and military capability simultaneously — enrichment facilities at Natanz, Fordow, and Isfahan; air defence installations across multiple provinces; and the command networks of the Islamic Revolutionary Guard Corps. The strikes killed Supreme Leader Ali Khamenei within hours of their commencement, making him the first head of state assassinated by a foreign military operation in the modern era and triggering an immediate succession crisis in Tehran. The assassination was not incidental to the campaign's design: US and Israeli planners assessed that decapitating the supreme leadership alongside the nuclear programme would maximise the probability of a strategic outcome — a post-Khamenei Iran too destabilised to reconstitute its nuclear capacity. The miscalculation was that the IRGC had prepared contingency command structures for precisely this scenario, and Khamenei's death did not produce the anticipated political paralysis but instead triggered the military's takeover of the succession process, installing Mojtaba Khamenei as supreme leader nine days later under conditions of explicit military pressure. The context in which Iran launched its retaliation was therefore one in which the constitutional government had been decapitated, the military had assumed sovereign control, and the new leadership's first public statement had vowed to continue fighting rather than negotiate.

Iran's response — designated Operation True Promise IV to signal continuity with the three prior operations of the same name dating back to April 2024 — was launched within hours of the February 28 strikes and continued in coordinated waves through early March. The operation targeted US military infrastructure across the region: air bases in Qatar, Kuwait, and Bahrain from which the US-Israeli air campaign was being conducted received sustained ballistic missile and drone salvos. Gulf State energy infrastructure — oil terminals, gas processing plants, and desalination facilities in Saudi Arabia and the UAE whose governments had provided operational facilitation or airspace to the attacking forces — was struck in a deliberate effort to raise the cost of regional acquiescence to the US-Israeli campaign. Iran deployed its most capable ballistic missiles in the operation, including variants of the Fattah-1 hypersonic missile and upgraded Shahab-3 derivatives that had been held in reserve through the three prior True Promise operations; the decision to deploy these systems signalled that Iran was no longer conserving its most advanced capabilities for deterrence but committing them to a sustained exchange. US Patriot and THAAD batteries at regional bases intercepted a significant share of the incoming missiles, but the sheer volume of the salvos — estimated at several hundred ballistic and cruise missiles over the operation's first seventy-two hours — produced hits at multiple facilities and killed US and Gulf State personnel. The IRGC Aerospace Force simultaneously launched drone swarms that saturated radar networks and created targeting problems for missile defence batteries attempting to prioritise simultaneous threats. The combination of ballistic missiles, cruise missiles, and drone swarms in coordinated sequences was the most sophisticated Iranian military operation on record, drawing on tactical lessons accumulated through three prior True Promise operations and intelligence assessments of regional air defence gaps.

The operation's most consequential dimension was not the missile strikes on US bases but the Iranian Navy and IRGC Naval Forces' action at the Strait of Hormuz. Within days of the initial strikes, Iran began imposing what it described as "enhanced maritime management" — requiring foreign-flagged vessels to obtain Iranian naval clearance before transiting, subjecting tankers to boarding inspections that took hours per vessel, and positioning naval assets at choke points that effectively slowed transit to a fraction of normal throughput. By mid-March, the Strait had been reduced to near-closure: the IEA described the disruption as the largest single supply interruption in the history of global oil markets, exceeding the 1973 Arab oil embargo and the disruptions of the Iran-Iraq War in scale and speed of impact. Roughly 20 percent of global seaborne oil and 17 percent of global liquefied natural gas passed through the Strait under normal conditions; the near-closure removed this volume from markets almost instantaneously. Brent crude, which had been trading in the mid-$70s per barrel before the conflict, surged past $100 in the first week and continued climbing. The economic damage extended far beyond energy prices: shipping insurance for the Persian Gulf was suspended by most major underwriters, dry-bulk and container traffic through the Strait collapsed as commercial operators rerouted around the Cape of Good Hope adding three weeks to voyage times, and petrochemical supply chains dependent on Gulf feedstocks began experiencing shortages in European and Asian markets. Iran's deployment of Hormuz as a strategic weapon reflected a calculation that the economic cost imposed on US allies and global energy consumers would accelerate pressure for a ceasefire faster than continued military exchange — and that the United States would face a choice between the military objective of degrading Iran's nuclear capacity and the economic objective of restoring the global energy flows whose disruption was producing consequences the US could not insulate its allies from. The Hormuz action also served a domestic legitimacy function: it demonstrated to the Iranian population, under aerial bombardment and economic blockade, that the IRGC could impose symmetrical costs on the adversary rather than absorbing punishment passively. The near-closure was Iran's most powerful lever — one that required no nuclear weapons, no peer military capability, and no victory in a conventional exchange to exercise. It was a veto on the global economy, wielded by a regime whose survival now depended on converting economic pressure into diplomatic necessity faster than the US military campaign could convert air superiority into a durable change in Iran's nuclear status. The weeks between Operation True Promise IV's launch and the April 7 ceasefire were, in strategic terms, a race between those two timelines — and neither side resolved it decisively before the ceasefire paused both clocks simultaneously.