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Speculation has been mounting in the United States about whether American soldiers will be deployed on the ground in Iran as the US-Israeli war entered its 12th day on Wednesday.
Democratic Senator Richard Blumenthal said he was the angriest he had been in his political career after he attended a classified Iran war briefing for the Senate Armed Services Committee on Tuesday.
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“I emerge from this briefing as dissatisfied and angry, frankly, as I have from any past briefing in my 15 years,” Blumenthal told reporters, adding that he had more questions than answers concerning the US goals.
“I am most concerned about the threat to American lives of potentially deploying our sons and daughters on the ground in Iraq. We seem to be on a path toward deploying American troops on the ground in Iran to accomplish any of the potential objectives here.”
It was the latest condemnation of the war on Iran by Democrats, who have faced Republican opposition in their attempts to rein in US President Donald Trump’s powers to go to war without the approval of Congress.
Democrats accused Trump’s Republican administration of failing to adequately justify why the US attacked Iran in the first place and why the war should continue.
Senator Chris Murphy, another Democrat who also attended the briefing, wrote in a post on X on Wednesday that while officials claimed the goal of the war was to destroy Iran’s military assets, they could not detail any long-term plan.
Trump said at the start of the war that the US aimed to stop Iran from producing nuclear weapons although Tehran has maintained that its nuclear programme is for civilian purposes only.
Analysts said a ground operation would be “extremely” difficult in Iran’s vast, rugged terrain but not impossible.
Here’s what we know about a possible US deployment and what such a mission could look like:
Smoke rises from air strikes near Azadi Tower in western Tehran on March 10, 2026 [AFP]What are US officials saying?
The US government has not confirmed whether American soldiers would be deployed in Iran, but officials have also not ruled out the possibility.
Defense Secretary Pete Hegseth told the CBS TV network this week that the US is “willing to go as far as we need to” and Washington will ensure Iran’s “nuclear ambitions are never achieved”.
White House Press Secretary Karoline Leavitt said last week that ground operations are “not part of the plan right now” but Trump was keeping options open.
Secretary of State Marco Rubio’s speech at a congressional briefing last week provided some clues as to why a ground force might be needed.
Rubio said the US needed to physically secure nuclear material in Iran.
“People are going to have to go and get it,” Rubio said without clarifying who that would be.
His statement came around the same time that it emerged Trump had spoken to Iranian Kurdish rebel groups based in Iraq along its border with Iran.
It’s unclear what was discussed, but analysts said it could involve the US seeking to use Kurdish armed forces as a proxy on the ground.
Most Americans oppose deploying US troops in Iran, polls suggested.
About 74 percent of respondents, most of whom leaned to the political left, were against it, according to a Quinnipiac University poll this week. In a snap text message poll at the start of the war, most respondents also told The Washington Post they were against the war.
According to a Reuters-Ipsos poll conducted in the hours after the war began on February 28, 43 percent of respondents said they disapproved of the war and another 29 percent said they were unsure. Only one in four respondents approved of the US-Israeli attacks.
An American soldier wipes his face during a sandstorm in the Iraqi desert south of Baghdad in 2003 [File: Peter Andrews/PA/CMC via Reuters]Which countries has the US invaded in recent decades?
The US has engaged in multiple combat operations since the end of the Cold War.
Washington and its NATO allies invaded Afghanistan in October 2001 in the wake of the September 11 al-Qaeda attacks that year on New York and the Pentagon. Then-US President George W Bush stated that the aim was to dislodge al-Qaeda fighters and capture Osama bin Laden, the armed group’s leader.
The invasion was the start of a 20-year-long war and occupation in Afghanistan, during which 170,000 to 210,000 people were killed. About 130,000 NATO soldiers were involved. When the US finally withdrew in 2021, 2,500 US soldiers were still stationed there.
Similarly, US troops and allied forces invaded and occupied Iraq in March 2003 to destroy alleged “weapons of mass destruction” and remove Saddam Hussein from power. It sparked the Iraq war, which led to between 150,000 and a million deaths. About 295,000 soldiers were involved at the start, and about 170,300 were withdrawn at the end of the war in December 2011.
Recently, US special forces attacked Venezuela and abducted President Nicolas Maduro and his wife. During the limited mission on January 3, the US military bombed Venezuelan air defences before a ground unit moved into Maduro’s Caracas compound. Venezuelan officials said at least 23 Venezuelan security officials were killed, and Cuba said 32 of its nationals who formed part of Maduro’s security detail were killed.
How might a ground invasion in Iran unfold?
Iran is four times larger than Iraq and features difficult mountainous terrain.
Unlike the Iraq invasion, a mission to physically recover nuclear material in Iran would likely be tightly defined with precise goals and involve far fewer soldiers to reduce risk, analysts said.
“It is far more likely to refer to limited, specialised operations involving small units targeting specific facilities, potentially supported by rapid-deployment forces, such as the 82nd Airborne Division,” Thomas Bonnie James, a professor at Qatar’s AFG College with The University of Aberdeen, told Al Jazeera.
The elite US Air Force division is trained for rapid parachute deployments in conflict zones to capture airfields or other key locations. The same unit was deployed during World War II, in Afghanistan and the Iraq wars.
The mission’s goal would be to locate and neutralise enriched uranium in Iran.
The target, the analyst said, would be Iran’s most critical nuclear facilities: the Natanz Nuclear Facility, the Fordow Fuel Enrichment Plant and the Isfahan Nuclear Technology Center. Kharg Island, the economically important coral island from which most of Iran’s oil exports flow, could also be targeted.
“Any limited ground operation would likely begin with gaining air superiority and suppressing Iranian air defences to allow aircraft and support assets to reach targets safely,” James said.
Rapid-deployment forces, such as the 82nd Airborne Division, would secure entry points, including airfields or staging areas. Specialised units like the US Navy SEALs or the US Army Special Forces would then carry out the most sensitive tasks on the ground, he said.
The mission would likely involve “penetrating hardened facilities, collecting intelligence, and locating or securing sensitive nuclear materials with the overall emphasis on speed, precision and limited exposure”, James said.
Once complete, a rapid exit strategy would likely kick in, he added, with troops moving swiftly to extraction points and exiting the country in a short period.
A satellite image shows the Natanz Nuclear Facility with new damage from the US-Israeli war with Iran near Natanz, Iran, on March 2, 2026 [Reuters]How could Iran respond?
After the US and Israel’s ignition of the war on Iran, Iran has launched multiple strikes on Israel and US military assets across the Gulf.
Other infrastructure has also been hit in Iraq, Bahrain, Kuwait, Qatar, Saudi Arabia, Jordan, Oman and the United Arab Emirates.
Analysts said this response is a clear indicator of how Iran could react to a US ground invasion.
A US ground mission, which would require sustained air support and a large ground contingent, could be risky and is likely to trigger “a severe response” from Tehran, Neil Quilliam of the UK think tank Chatham House said.
Even a small operation could escalate the conflict and trigger more Iranian missile strikes or attacks by Iranian proxy groups, such as Hezbollah in Lebanon and Yemen’s Houthis, experts say.
“These would be high-risk, complex and lengthy operations taking place in very hostile environments and against facilities heavily protected by the country’s security forces” at a time when Iran’s military command still appears intact, Quilliam added.
Hasn’t the US already attacked Iran’s nuclear sites?
Indeed, it has.
During the 12-Day War on Iran in June, the US attacked Iran’s three biggest nuclear facilities under Operation Midnight Hammer: Fordow, Natanz and Isfahan. This was an elaborate covert mission that officials said was aimed at wiping out Tehran’s nuclear enrichment capabilities.
Within 30 minutes and under the cover of night, US stealth bombers entered Iran’s airspace and dropped powerful bunker-buster bombs, designed to penetrate hardened mountainous structures that Fordow and Natanz are built into. A US submarine then fired two dozen Tomahawk missiles on the Isfahan research and production site.
US officials said the bombers had withdrawn from Iranian airspace by the time Tehran detected it was under attack.
Trump claimed the sites were “obliterated” while Israel also said it had assassinated several Iranian nuclear scientists.
However, Iranian officials at the time said the attack on its facilities had been expected and Fordow had been evacuated in advance.
Rafael Grossi, head of the International Atomic Energy Agency, then warned that Iran could resume uranium enrichment – the process of bringing uranium up to weapons-grade standard – “in a matter of months” because some facilities were “still standing”.
Grossi said Tehran had stockpiles of 60-percent enriched uranium by the time of the strikes and it wasn’t clear if they had been moved. At that level, uranium is just below weapons grade, and if refined further, could be used to produce nuclear bombs.
On February 24, only four days before the US and Israel began another war on Iran, White House spokesperson Leavitt said again that Operation Midnight Hammer had been an “overwhelmingly successful mission”.
