The War Enters a Dangerous New Phase as NATO Throws Its Weight Behind U.S. Operations and Thousands of Marines Deploy to the Gulf
As the U.S.-Iran war grinds into its fourth week, the conflict is entering what military analysts are calling its most dangerous phase yet. NATO Secretary General Mark Rutte has publicly declared the alliance’s full support for Operation Epic Fury, thousands of additional U.S. Marines are steaming toward the Persian Gulf aboard amphibious assault ships, and the Pentagon is actively considering a ground operation to seize Iran’s vital Kharg Island — the heart of Tehran’s oil exports.
The developments come as President Trump’s explosive 48-hour ultimatum to Iran — demanding the full reopening of the Strait of Hormuz or face the obliteration of Iranian power plants — approaches its deadline. Iran has responded with defiance, vowing to destroy energy and water infrastructure across the entire Middle East if its power facilities are targeted.
NATO Goes All In: Rutte Declares Full Support for Epic Fury
In a pivotal appearance on CBS’s Face the Nation on Sunday, March 22, NATO Secretary General Mark Rutte delivered what may be the most significant statement of allied solidarity since the war began.
“I’ve been in several conversations this week with the president,” Rutte said. “We had the U.S. for weeks planning for Epic Fury, and for reasons of security and safety, they could not share with European allies and allies around the world and partner countries what they were doing, because that would have jeopardized the effect of the first attack.”
Rutte’s comments represent a dramatic shift from earlier in the conflict, when European leaders publicly refused to join any NATO-led effort against Iran. The Secretary General went further, comparing the military campaign against Iran to the world’s failed efforts to prevent North Korea from acquiring nuclear weapons — effectively framing Operation Epic Fury as a necessary action to prevent a nuclear-armed Iran.
According to POLITICO, Rutte expressed confidence that European nations would ultimately come together on Iran, despite significant domestic opposition to the war across the continent.
This comes just days after Trump called NATO allies “cowards” for their refusal to help secure the Strait of Hormuz, and labeled the alliance a “paper tiger without the U.S.”
4,700 Marines and Three Warships: The Ground Option Emerges
Perhaps the most consequential military development this week is the deployment of approximately 4,700 additional U.S. Marines to the Middle East aboard multiple amphibious assault ships, including the USS Tripoli and USS Boxer.
According to Military.com, a second Marine Expeditionary Unit of about 2,200 Marines departed California earlier this week aboard three warships, joining another 2,500 Marines already en route. These forces will join more than 50,000 U.S. troops already stationed across the region.
The Marine deployment has fueled intense speculation about a potential ground operation — specifically, the seizure of Kharg Island, the tiny but strategically crucial island through which approximately 90% of Iran’s oil exports flow.
Axios reported that the White House and Pentagon are actively considering the Kharg Island option. One U.S. official told the outlet bluntly: “He wants Hormuz open. If he has to take Kharg Island to make it happen, that’s going to happen. If he decides to have a coastal invasion, that’s going to happen.”
Military analysts note that a “vertical insertion” — using helicopter-borne Marines to seize the island from above — may be the only viable approach, given Iran’s extensive mine-laying operations in surrounding waters.
The U.S. Air Force already conducted a major bombing raid on Kharg Island on March 13, striking more than 90 Iranian military sites while deliberately sparing oil and gas infrastructure — a move many now interpret as preparation for a potential ground seizure.
Trump’s 48-Hour Ultimatum: The Clock Is Ticking
Looming over all of this is President Trump’s dramatic ultimatum, posted on Truth Social on Friday, March 21:
“If Iran doesn’t FULLY OPEN, WITHOUT THREAT, the Strait of Hormuz, within 48 HOURS from this exact point in time, the United States of America will hit and obliterate their various POWER PLANTS, STARTING WITH THE BIGGEST ONE FIRST!”
The deadline is set to expire on Sunday evening, and there is zero indication that Iran intends to comply.
Iran’s response has been swift and menacing. Parliament Speaker Mohammad Bagher Ghalibaf stated on March 22 that Iran would strike “critical infrastructure and energy facilities in the region” if Iranian power plants are attacked. Iran’s military went even further, warning that all energy infrastructure belonging to U.S. and Israeli allies in the region would be targeted.
According to The Guardian, Iran has also threatened to destroy water desalination facilities across the Gulf — a move that could trigger a humanitarian catastrophe in countries like Saudi Arabia, the UAE, Kuwait, and Bahrain, where desalinated water supplies much of the population.
U.S. Treasury Secretary Scott Bessent, asked whether Trump was “winding down” or “escalating” the war, offered a cryptic response to NBC News: “They are not mutually exclusive.”
Israel Launches New Wave of Strikes on Tehran
Late on Sunday night, the Israeli military announced it had launched a new wave of “extensive strikes” on Tehran targeting Iranian regime infrastructure. Blasts were heard across the Iranian capital, while separately, Saudi Arabia’s defense ministry reported intercepting two ballistic missiles fired toward the Riyadh area.
The strikes came on Day 23 of the war, which has seen Iran fire hundreds of drones and ballistic missiles at targets in Israel, U.S. military bases across six countries, and civilian infrastructure in several neighboring nations. Iran has attacked targets in Bahrain, Jordan, Kuwait, Qatar, Saudi Arabia, Turkey, the UAE, and even struck Britain’s Akrotiri military base on Cyprus. Two ballistic missiles were also launched at the remote U.S. military base on Diego Garcia in the Indian Ocean — an unprecedented escalation.
The UAE reported intercepting three ballistic missiles and eight drones from Iran on Saturday alone, underscoring the scale of Iran’s retaliatory campaign.
Global Travel Warning and Energy Crisis
The U.S. State Department has issued a worldwide advisory urging all Americans to exercise “increased caution,” warning that groups supportive of Iran could target locations associated with the United States and Americans anywhere in the world.
The International Energy Agency (IEA) chief has reportedly described the energy crunch triggered by the Iran war as worse than the 1970s oil crises and the Ukraine war combined. Iran has effectively shut down the Strait of Hormuz by attacking ships and laying mines in the waterway, through which roughly 20% of the world’s oil supply normally flows.
As of March 12, Iran had made 21 confirmed attacks on merchant vessels attempting to transit the strait, bringing commercial shipping to a near-complete halt.
What Comes Next
The convergence of NATO support, Marine deployments, and Trump’s expiring ultimatum points to a critical 48 to 72 hours ahead. If Iran does not reopen the Strait of Hormuz — and no one expects it will — the question becomes whether the U.S. will follow through on the power plant threat, launch a Kharg Island ground operation, or both.
With more than 50,000 U.S. troops in the region, 4,700 Marines en route, carrier strike groups launching daily sorties from the USS Gerald R. Ford, and NATO now publicly backing the operation, the military infrastructure for a significant escalation is already in place.
Trump has repeatedly said he has “no plans” to send ground forces into Iran, but has also asserted he retains all options. As one senior administration official told reporters: the president wants Hormuz open, and he’s willing to do whatever it takes to make that happen.
The world is watching. The clock is ticking. And the most dangerous phase of Operation Epic Fury may be just beginning.
This is a developing story. Check back for updates as the situation evolves.