USS Tripoli, 2,500 Marines Headed to Middle East

Amphibious assault ship and troops deployed to bolster U.S. military presence amid ongoing conflict with Iran.

Mar. 13, 2026 at 10:36pm

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The USS Tripoli, an amphibious assault ship carrying 2,500 Marines from the 31st Marine Expeditionary Group, is being deployed to the Middle East as the war with Iran enters its third week. The move comes as the U.S. seeks to bolster its military power in the region and ensure freedom of navigation through the Strait of Hormuz, which Iran has closed to most traffic.

Why it matters

The deployment of the USS Tripoli and additional Marines is a significant escalation of the U.S. military presence in the Middle East as the conflict with Iran intensifies. It signals the Pentagon's desire to maintain a strong military posture in the region and protect vital shipping lanes through the Strait of Hormuz, which Iran has threatened.

The details

The Tripoli, which had been operating in the Philippine Sea, is now headed west through the Luzon Strait south of Taiwan. It's unclear if the USS San Diego and USS New Orleans, which had been with the Tripoli, are also being moved closer to Iran. The 31st MEU on board the Tripoli is capable of conducting ground operations, though no such operations have been announced. The U.S. is also planning to take out Iranian anti-ship missiles in the area and is focused on ensuring freedom of navigation through the Strait of Hormuz, which Iran has closed to most traffic.

  • The USS Tripoli and its 2,500 Marines are being deployed to the Middle East.
  • The war in Iran has entered its third week.

The players

USS Tripoli

An amphibious assault ship of the United States Navy.

31st Marine Expeditionary Group

A Marine air-ground task force that was previously operating in the Philippine Sea and is now being deployed to the Middle East aboard the USS Tripoli.

Iran

The country that the U.S. is currently in conflict with, having closed the Strait of Hormuz to most traffic.

U.S. Central Command (CENTCOM)

The U.S. military command responsible for operations in the Middle East, which has requested additional military options from the Pentagon.

Donald Trump

The President of the United States, who said he is considering sending U.S. Navy vessels to escort shipping vessels through the Strait of Hormuz.

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What they’re saying

“We have been dealing with it and don't need to worry about it.”

— Pete Hegseth, Defense Secretary (UPI)

“That means going after Iran's mine-laying capability and destroying their ability to attack commercial vessels.”

— Gen. Dan Caine, Joint Chiefs of Staff Chair (UPI)

What’s next

The judge in the case will decide on Tuesday whether or not to allow Walker Reed Quinn out on bail.

The takeaway

The deployment of the USS Tripoli and additional Marines to the Middle East represents a significant escalation of the U.S. military presence in the region as the conflict with Iran intensifies. It signals the Pentagon's determination to maintain control of vital shipping lanes and degrade Iran's military capabilities, even as the war enters its third week.