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Half of the 4,000-strong California National Guard force deployed by President Donald Trump to Los Angeles a month ago is returning home, but 700 Marines are set to remain.

As protests quickly quieted, Marines appear to now be guarding buildings that don’t require such a forceful presence, leading to a lot of hanging around. Officials say their mission is mainly just “being present.”

The Marines, who arrived in LA under Trump’s orders amid objections from California’s governor, Gavin Newsom, will continue to stand guard at three buildings — the Wilshire Federal Building, which houses the LA FBI and Veterans Affairs offices, a courthouse, and the LA Immigration and Customs Enforcement headquarters building. US Northern Command confirmed to BI on Wednesday that the mission hasn’t changed since the Marines first arrived.

Some of those Marines, recent arrivals who took over for teammates who showed up in June, are suffering a blow to morale, with some feeling the work isn’t what they joined the military for, according to a senior Marine official with knowledge of the deployment. The Pentagon did not respond to request for comment.

Such duties are far outside the norm for Marines who do not possess the same legal authorities as National Guard troops, which may conduct law enforcement within the US, though almost always at the request of their state’s governor. Active-duty troops, like the Marines in LA, are barred by law from doing so, short of the president invoking the Insurrection Act.

“Their purpose is really just being a presence that is very much out in the open, showcasing kind of who they are, what they do,” said the senior Marine official, who spoke to Business Insider on condition of anonymity because they were not authorized to speak to the press.

A second Marine source confirmed that Marines continue to guard the buildings, adding those stationed at the Wilshire Federal Building are dispersed at vehicle and pedestrian entry points and patrol the building’s perimeter, a fairly routine task infantry personnel perform that could be seen as an opportunity to practice the skills in a delicate environment.

“There’s nothing going on,” said the second Marine of the atmosphere in LA after protests formed last month in response to ICE raids targeting immigrants, often without criminal histories. Other news reports have indicated that the Marines and Guardsmen remaining in LA are fighting boredom and public contempt.

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Marines train for a variety of war-related tasks, which do not include anything similar to how Marines are being used in LA, the senior official said. “And I think that certainly has a degree of degradation of morale.”

Infantry units like the 7th Marine Regiment in LA are trained in the Corps’ most fundamental mission— locating, closing with, and destroying the enemy by a mix of fire and maneuver, Joe Plenzer, a retired Marine infantry officer, told Business Insider last month.

“Beneath the Kevlar, the eye-pro, if you see a face, the face is probably, you know, a little bit of disappointment, a little bit of ‘this is not what I signed up for,’” said the senior official. “And by a little bit, I mean a lot of it.”

“Let’s be honest, too, there’s a percentage of our Marines that are coming from backgrounds where their immediate family members are at risk of getting deported from ICE,” the senior official said.

The service— which has the highest percentage of Hispanic troops compared to the other services, nearly 26% in 2022 — has found itself wrestling with new immigration enforcement policies on multiple fronts. The father of three US Marines, brutally beaten and detained by ICE agents, was released from custody earlier this week following efforts from his sons and other advocates, according to a report from Military.com.

Although active-duty Marines are generally barred from participating in domestic law enforcement, they are permitted to support the civilian agencies. The Marines, though made for a very different mission, appear to be supporting ICE more frequently.

The Pentagon ordered 200 air-support Marines to Florida earlier this month to assist with administrative oversight at ICE detention centers there. And the Corps appears to be the first and only service with a pilot program in place with ICE at three bases to ostensibly guard against access by foreign personnel, according to Military.com.

Deepening ties with ICE in Florida and at the three bases, as well as the deployment to LA, could be taking a toll on Marines worried about their families, the senior official said. “What do you think that does to them?” they said of Marines who may have family members who immigrated illegally. There could be a notable effect, they suggested, “not only morale, but just like, in terms of their ethics and their values.”

“My hope is that they’re quickly relieved of being in that position,” he continued. “And it’s no longer a thing.”