The United States Is Sending Thousands of Marines to the Middle East: Possible Uses Explained

(SeaPRwire) –   The U.S. military is sending thousands of Marines and additional warships to the Middle East at the same time that President Donald Trump’s senior officials are said to be discussing a possible end to the war with Iran.

According to the Wall Street Journal, approximately 2,200 Marines from the 31st Expeditionary Unit, who are traveling on the USS Tripoli, are scheduled to reach the region on Friday, accompanied by the amphibious landing dock USS New Orleans.

An additional 2,500 Marines from the 11th Marine Expeditionary Unit, known as the “Pride of the Pacific,” are en route from California aboard the USS Boxer.

Military leaders are also said to be considering sending a combat brigade from the Army’s 82nd Airborne Division, which functions as an “Immediate Response Force” consisting of roughly 3,000 troops that can be deployed globally within 18 hours.

These military movements occur as the first cautious indications of ceasefire negotiations emerge since fighting started on February 28. Following his ultimatum to Iran to reopen the Strait of Hormuz or have its power grid destroyed, Trump posted on Truth Social Monday that he held “constructive conversations” with Iranian leaders about “a complete and total resolution of our hostilities in the Middle East.”

Iran has rejected claims that any discussions occurred. A foreign ministry statement, carried by the semiofficial Mehr News Agency, asserted that Trump’s comments were intended to “lower energy prices and buy time to execute his military plans.”

TIME spoke with military analysts who indicate this skepticism might be justified.

“The addition of the 11th MEU suggests to me that a larger operation is underway,” Michael “Mick” Patrick Mulroy, who served as Deputy Assistant Secretary of Defense for the Middle East during Trump’s first term from 2017 to 2019, tells TIME. “It signals to me that someone intends to utilize both units for a specific purpose.”

What are Marine Expeditionary Units?

The U.S. currently maintains 50,000 military personnel throughout the Middle East, though the majority are not infantry units trained for invading nations.

Marine Expeditionary Units (MEUs) differ significantly. These amphibious assault forces function as sea-based, forward-deployed units that frequently serve as the initial responders to conflict zones.

These units comprise ground combat elements with hundreds of infantry soldiers, armored vehicles and artillery, helicopters and strike aircraft, a logistics support component, and a command structure. MEUs were deployed during the 2001 invasion of Afghanistan and the 2003 Iraq invasion, specializing in amphibious operations.

“They possess a fully integrated, self-sufficient air support system. They represent a complete force that can deploy anywhere globally, accessible from the sea and capable of operating far inland to conduct assaults,” Mulroy explains.

According to Jason Campbell, a senior fellow at the Middle East Institute, these forces are built for crisis response missions rather than prolonged occupation.

“MEUs and their attached assets aren’t intended to serve as long-term occupying forces,” says Campbell, who spent two years as Afghanistan country director in the Office of the Secretary of Defense for Policy. “They’re highly capable, but only for short-term, limited-scope operations.”

What could the Marines be used for?

Based on Trump’s public remarks and information from administration officials, his primary objective currently is reopening the Strait of Hormuz.

This narrow channel carries one-fifth of global oil supplies and has been effectively shut down by Iran since February 28, creating severe disruptions to worldwide oil markets. Over the weekend, Trump vowed to destroy Iran’s electrical grid if the Strait wasn’t reopened, leading Iran to threaten strikes against American and Gulf energy facilities in response.

Axios reports, citing four knowledgeable sources, that one option Trump is reportedly contemplating to reopen the Strait involves seizing Kharg Island—a key petroleum facility located 15 miles off Iran’s coast that handles 90 percent of the nation’s crude oil exports.

Certain officials think that taking control of the island would provide the U.S. with bargaining power to compel Iran to reopen the Strait.

Despite the island’s importance to Iran’s petroleum sector, such an operation would expose forces to heavy Iranian fire, creating what Campbell describes as a “high-risk, low-reward” scenario.

U.S. airstrikes have largely destroyed the island’s defensive capabilities, simplifying its capture, but any forces positioned there would have limited defense against Iranian counterattacks.

“Kharg sits just 15 miles from Iran’s shoreline. Securing it long-term would require substantial resources,” Campbell observes, highlighting how much nearer this would place troops to Iran compared to existing U.S. Gulf bases. “They’d face near-continuous attacks from rockets, drones, missiles, and naval threats.”

While these troops might secure Kharg temporarily until reinforcements arrive, the island—despite its small size—hosts thousands of civilians, and its capture would be “highly escalatory,” according to Mulroy, possibly lacking strategic value for the U.S.

Apart from Kharg, Marines could deploy to other strategic sites, including smaller islands near the Strait of Hormuz, battling to “secure territory that would enable them to neutralize coastal positions threatening naval vessels,” Mulroy explains.

‘We mean business’

Even with Kharg under U.S. control, “[Iran will] probably still manage to export some oil, and they’ve already shown they can survive for quite a while without exporting the just over one million barrels per day they’ve developed in recent years,” Campbell notes. “They’ve proven their resilience.”

Iran might also target vulnerable energy and petroleum infrastructure in Gulf nations, potentially driving oil prices up even further than current spikes, with reconstruction taking an extremely long time.

Mulroy also cautions about the reported 5,000 naval mines Iran could employ, which he says would have “catastrophic” consequences if deployed.

The forces may be moving toward combat. Alternatively—in line with Trump’s second-term foreign policy approach—they could serve as “a message to Iran that we’re serious about putting boots on the ground,” Campbell suggests, “hoping that changes their strategic calculations.”

“Is this merely intended to intimidate Iran? I doubt it will be effective,” Mulroy states.