The U.S. military says its blockade of the Iranian coast is now fully in effect—and it’s also moving more hardware and people into position in the Middle East.
This week, the Pentagon announced the arrival of the USS George H.W. Bush, escorted by Navy warships, heading toward the region. That deployment adds roughly 6,000 troops who could be used to bolster blockade efforts or to strike back if Iran carries out threats to retaliate for closing its ports. Defense Secretary Pete Hegseth put it bluntly in a press briefing Thursday: “We can do this all day.”
For sailors already in the fight, “all day” is more than a talking point. The USS Gerald R. Ford—ordered from the Mediterranean to the Caribbean for the capture of former Venezuelan leader Nicolás Maduro in January, then to the Middle East in February—reached its 296th day of deployment Wednesday, setting a post-Vietnam War record. On the water, ship traffic through the Strait of Hormuz dropped significantly and appears little changed since the blockade began Monday. Two U.S. Navy destroyers entered the strait last week to begin mine-clearing operations, even as the day-to-day rhythm for crews stays tense.
Part of the anxiety is simple physics and the reality that leaving the strait can be its own kind of risk. Adm. Daryl Caudle, Chief of Naval Operations, warned Wednesday that vessels—both military and commercial—could become more vulnerable to mines and other potential Iranian strikes when leaving the strait than when coming into it. Shipowners and crews, not surprisingly, are sensitive to such possibilities. One imagines the worry hanging in the control rooms: the steady hum of equipment, the shift of voices when a briefing ends, the faint, metallic smell you get near fuel and machinery—small details that don’t make headlines, but still define the atmosphere.
At the same time, there’s a more complicated problem on the horizon: if peace talks move forward and vessel traffic picks up, the Navy could end up dealing with more than it can comfortably manage. Retired Navy officer Bryan McGrath, who previously commanded one of the guided-missile destroyers taking part in Operation Epic Fury, says the pace of operations could make the mission harder as activity increases. The Navy has not yet needed to board any ships, Gen. Dan Caine, chairman of the Joint Chiefs of Staff, said during a Pentagon briefing Thursday morning. But if boarding becomes necessary, McGrath argues, the blockade could get messier—especially if Chinese-flagged vessels carrying Iranian oil are involved.
In that scenario, interdiction rules would collide with the politics of flags. McGrath notes that tensions could deepen further if the tankers are escorted by Chinese warships. The U.S. must also stay inside strict rules of engagement built around centuries of Navy tradition and treaties governing blockades. “This is a major undertaking,” Caudle said Wednesday.
Meanwhile, Misryoum reporting indicates that about 10,000 U.S. troops, along with a dozen warships and more than 100 aircraft, are participating in the Strait of Hormuz blockade, according to U.S. Central Command, which runs operations in the Middle East. On Tuesday, an Iranian-flagged cargo vessel tried to evade the blockade. A U.S. guided missile destroyer “successfully redirected the vessel, which is heading back to Iran,” the command said. No ships have broken through the blockade so far, and 10 merchant vessels complied with U.S. direction to turn around and reenter an Iranian port on the Gulf of Oman.
There’s also the question of how exactly the geography is shaping the threat picture. The Strait of Hormuz connects the Persian Gulf and the Gulf of Oman. It’s about 20 miles wide at its narrowest point, but the shipping lanes get squeezed further—about two miles in each direction. Transiting ships are funneled into those lanes, making them easier targets. Along the mountainous coastline, Iran’s Islamic Revolutionary Guard Corps is believed to have hidden weapons and speedboats in man-made “wet tunnels.” The U.S. counters with radar systems for missiles and drones, along with surface-to-air missiles and guns. The Navy is also using helicopters launched from ships, equipped with guns that can shoot down enemy drones—tools McGrath calls “one of the best” for defending against Iran’s Shahed drones.
Even routing decisions reflect the broader security environment. Misryoum analysis notes that as the USS George H.W. Bush travels east to the Arabian Sea, it’s diverting and going around the coast of Africa instead of the standard route through the Mediterranean and Red Seas—an apparent effort to avoid Houthi attacks carried out in solidarity with Iran.
Legality is another fault line. Iran has called the blockade an act of war that could upend a ceasefire deal, but Misryoum newsroom reporting cites legal analysis saying the blockade has been carried out in keeping with the laws of naval warfare. Raul Pedrozo, professor of the law of armed conflict at the U.S. Naval War College, argues that because the U.S. is fighting a war it has the “absolute right to stop every neutral vessel” to determine whether it’s carrying contraband, while still requiring cautious application so it isn’t viewed as interfering with neutral trade. He also says a lawful blockade must be impartially applied to friends and foes alike, and that could strain relationships with other countries if boarding or enforcement hits ships under other flags.
The Chinese foreign ministry has called the U.S. blockade “dangerous and irresponsible.” To avoid boarding, Beijing could use its own Navy warships to escort Chinese-flagged vessels, a move that could put U.S. forces in a bind—something like a public dare. Misryoum analysis suggests Beijing would calculate that the U.S. is unlikely to shoot on escorts, because that could look like attacking a third party just for protecting a tanker route. And for Washington, that possibility means the coming days could hinge less on statements and more on what happens when ships start to test the edges of the rules—whether deliberately or by mistake.
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