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US Navy Launches Strait of Hormuz Blockade, Halting Iran’s Oil Exports

US Navy Launches Strait of Hormuz Blockade, Halting Iran’s Oil Exports
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A new U.S. naval blockade around Iran’s ports in the Strait of Hormuz stopped six merchant ships and jolted global energy markets this week, as Washington moved to choke off what it calls Tehran’s “illegal tolls” on maritime traffic and Iran denounced the move as piracy nbcnews +1. Oil prices jumped toward $100 a barrel and key allies publicly distanced themselves from the operation, exposing deep divisions over how far to go in the six‑week‑old war with Iran bbc +1.

CENTCOM said the blockade, in force since 10:00 a.m. ET on Monday, applied to all vessels entering or leaving Iranian ports on the Gulf and Gulf of Oman, but not to ships simply transiting the Strait of Hormuz to other countries’ terminals wsj. In its first 24 hours, “no ships made it past the U.S. blockade” and six merchant vessels complied with orders to turn around and re‑enter Iranian ports, the command said nbcnews +1. Iran, which had already been restricting traffic and levying transit fees, called the restrictions “illegal” and a “grave violation” of its sovereignty, warning that approaching warships would be treated as ceasefire violations cnn +1.

A High‑Risk Gamble to Squeeze Iran’s Oil Lifeline

The blockade targeted a core pillar of Iran’s wartime economy: crude exports that averaged about 1.84 million barrels per day in March and could account for roughly 2 million barrels a day of global supply at risk if fully halted nytimes. U.S. officials framed the move as a way to cut off revenue from Tehran’s makeshift toll system and force it back to talks on tougher nuclear and security terms, with Vice President J.D. Vance saying that if Iran engaged in “economic terrorism,” then “no Iranian ships are getting out either” aljazeera +1.

Analysts warned, however, that while the U.S. Navy has the capacity to interdict traffic, a prolonged blockade would be an open‑ended military commitment involving more than 10,000 personnel and over a dozen warships and aircraft in a region already on edge nbcnews +1. Historical precedents—from the Berlin blockade to earlier “tanker wars” in the Gulf—suggest such operations can rapidly escalate, especially as Iran retains land‑based missiles, drones and fast boats arrayed around the narrow 21‑mile‑wide chokepoint nytimes. Ship‑tracking firms reported at least three Iran‑linked tankers still transiting the strait on the first full day, underscoring both the operational complexity and questions over how airtight enforcement really is cbsnews.

Allies Balk and Markets Brace for Energy Shock

The operation immediately tested U.S. diplomacy. Britain’s Prime Minister Keir Starmer said the UK would not join the blockade, focusing instead on mine‑clearing and broader efforts to reopen the strait, while EU foreign policy chief Kaja Kallas stressed that the bloc “does not support any action that curtails free navigation” aljazeera +1. France floated a separate “peaceful multinational mission” to restore safe passage, and China called the U.S. move “dangerous and irresponsible,” emphasizing its heavy reliance on Gulf energy cnn +1. The split highlighted a gap between Washington’s coercive approach and partners’ preference for de‑escalation and shared security arrangements.

Energy markets reacted swiftly. U.S. crude futures for May settled at $99.08 a barrel and Brent near $99.36, with some trades briefly above $100 as traders priced in the risk of up to a fifth of global oil and LNG flows being disrupted if the crisis widens beyond Iranian ports bbc +1. Early knock‑on effects appeared in consumer and corporate costs: Florida’s average gasoline price jumped almost nine cents in a day, snapping a 10‑day decline, and Australia’s Qantas raised its jet fuel cost outlook, saying its fuel bill had more than doubled since the start of the Iran war jpost +1. Analysts noted that inventories and tankers already inside the Gulf could cushion the blow only into late April, after which a sustained cutoff would start to bite more sharply nytimes +1.

The Bigger Picture

The blockade turned the Strait of Hormuz from a contested front in a regional war into a live test of how much economic pain Washington, Tehran and the rest of the world are prepared to absorb. With President Donald Trump hinting that U.S.–Iran talks could resume “over the next two days” even as U.S. commanders tighten enforcement aljazeera, the standoff now hinges on whether limited, targeted pressure can yield a diplomatic breakthrough before spiraling energy costs, legal challenges and escalation risks force all sides back from the brink.