‘This is the last warning.’ Iran threatens U.S. warships after they throw down the gauntlet for winner-take-all Strait of Hormuz

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‘This is the last warning.’ Iran threatens U.S. warships after they throw down the gauntlet for winner-take-all Strait of Hormuz

Jason Ma
4 min read

A U.S. Navy destroyer in the Strait of Hormuz on April 11, 2026.

(U.S. Central Command)

U.S. Navy ships sent an unmistakable signal Saturday as they crossed the Strait of Hormuz, challenging Iran’s control over the narrow waterway that will likely determine the outcome of the Middle East war.

The USS Michael Murphy turned on its automatic identification system as it and another destroyer, the USS Frank E. Peterson, transited the strait, breaking the typical protocol of Navy ships sailing with their AIS turned off.

“You just don’t throw AIS on by accident on a Navy ship,” Campbell University professor Salvatore Mercogliano, who specializes in military and maritime history, said on his podcast. “This is purposeful. They wanted to turn this on on the far side of the Strait of Hormuz to demonstrate that they have sailed through.”

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U.S. Central Command said the destroyers had begun setting conditions for clearing mines that had been placed by Iran’s Islamic Revolutionary Guard Corps.

It added that more U.S. forces, including underwater drones, will join the clearance effort in the coming days, pointing out that the strait is an international sea passage and an essential trade corridor.

In a statement, Admiral Brad Cooper said Central Command is “establishing a new passage” for the maritime industry for the free flow of commerce.

Iran’s grip on the strait, through which one-fifth of the world’s oil and liquid natural gas flowed before the war, has triggered a global energy crisis and represents the regime’s main form of leverage over the U.S.

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The destroyers’ crossing of the strait comes as the U.S. and Iran began ceasefire talks in Pakistan this weekend. But if the Navy creates a safe avenue for tankers that doesn’t require getting Iran’s permission and paying a toll, then talks would shift in America’s favor.

As a result, the IRGC challenged the Navy destroyers as they transited, according to a radio conversation recorded by a civilian ship that was shared with the Wall Street Journal.

“This is the last warning. This is the last warning,” the IRGC said.

“Passage in accordance with international law. No challenge is intended to you, and I intend to abide by rules of our government’s ceasefire,” the U.S. ship replied.

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Iranian media said the destroyers turned around after being confronted by the IRGC, which reportedly  launched a drone in the direction of the destroyers. The IRGC also said any attempt by military ships to cross the strait would be met with a “firm and forceful response.”

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