Iran's Defence Council issued a formal statement on Sunday: any attack on Iranian coasts or islands will "lead to the mining of all access routes in the Persian Gulf." the Council cited Iran's mining of these waters during the 1980–88 war with Iraq as "established military practice" 1. The statement arrived while Trump's 48-hour ultimatum to strike Iranian power plants — many of which sit on or near the coast — was still nominally active, though he postponed strikes hours later.
The historical reference is precise. During the Tanker War phase of the Iran-Iraq conflict (1984–88), Iran deployed mines across Gulf shipping lanes using naval vessels, civilian dhows, and the converted landing ship Iran Ajr. In April 1988, the frigate USS Samuel B. Roberts struck an Iranian contact mine in the central Gulf, nearly sinking the vessel and triggering Operation Praying Mantis — the largest US naval surface engagement since the Second World War. Mine clearance continued for months after the July 1988 ceasefire. The lesson Iran's military establishment drew was specific: mines imposed costs on a vastly superior navy disproportionate to their price, and their effect on commercial shipping — through insurance withdrawal rather than physical destruction — exceeded their direct military damage.
Mines would alter the conflict's maritime dimension in a way that missiles and drones have not. Iran's ballistic stockpiles are a depreciating asset under sustained attrition. Mines are the opposite: cheap, locally manufactured, deployable from small boats in quantities that overwhelm clearance capacity. The US Navy's mine countermeasures force — the subject of repeated Government Accountability Office warnings about readiness gaps and ageing platforms — would require weeks to months to clear a mined Gulf. Lloyd's of London war-risk premiums already run between $3.6 million and $6 million per voyage for very large crude carriers . Confirmed mines would not raise those premiums; they would suspend coverage entirely.
The Defence Council's threat extends a pattern of graduated maritime escalation: from initial strait closure, to selective passage for non-hostile nations, to the IRGC's operational toll system, to conditional permanent closure if power plants are struck . Mining would be the next stage — and the hardest to reverse. Missiles stop when launchers are destroyed or stockpiles run out. Mines do not stop being dangerous when a ceasefire is declared.
