In a rare and controversial turn of events, active-duty U.S. Marines deployed to Los Angeles detained an Army veteran outside a federal building on Friday, marking the first known civilian detention by military forces on U.S. soil in recent memory. The incident occurred just hours ahead of over 1,800 protests planned across the United States in opposition to President Donald Trump’s military parade in Washington D.C., timed with the 250th anniversary of the U.S. Army and Trump’s 79th birthday.
The detention of Marcos Leao, a 27-year-old immigrant and naturalized citizen who served in the U.S. Army, has intensified scrutiny over Trump’s unprecedented use of military personnel for domestic law enforcement purposes. His administration deployed nearly 700 Marines to Los Angeles earlier this week to assist the National Guard in safeguarding federal infrastructure amid ongoing protests against federal immigration raids.
Why were U.S. Marines deployed in Los Angeles?
President Trump ordered the Marine deployment following days of street demonstrations that erupted in response to aggressive immigration enforcement actions. California officials, including Governor Gavin Newsom and Los Angeles Mayor Karen Bass, objected to the decision, calling it a violation of state sovereignty and an escalation of force against peaceful demonstrators.
Major General Scott Sherman, who oversees both the National Guard and Marine deployments in the region, confirmed that around 200 Marines were stationed at the Wilshire Federal Building. Their mission, Sherman said, is to protect federal property and personnel. Marines are authorized to temporarily detain individuals in “specific circumstances,” but must hand over detainees to civilian law enforcement agencies.
Legal experts and constitutional scholars have raised alarms about the invocation of military authority in civilian contexts, pointing to potential violations of the 1878 Posse Comitatus Act, which limits the federal government’s ability to use military forces for domestic law enforcement without congressional approval.
What happened to Army veteran Marcos Leao?
On Friday afternoon, Reuters journalists witnessed Marines restraining Leao with zip ties after he crossed a yellow tape barrier outside the Wilshire Federal Building. Leao, who said he had business with the Veterans Administration inside, claimed he was unaware the area was restricted. He complied with commands, was detained for nearly two hours, and was ultimately handed over to the Department of Homeland Security.
Leao later stated that he was treated respectfully and was told by the Marines that they mistook him for a protester. “They treated me very fairly,” he said. “They told me, ‘Understand, this is a whole stressful situation for everybody, and we all have a job.’”
Northern Command confirmed the detention after Reuters provided images. Officials emphasized that active-duty troops are not permitted to perform arrests but may briefly detain individuals in situations involving federal property security.
Protests in Los Angeles continue for the eighth day
Friday’s detention came as Los Angeles marked its eighth consecutive day of demonstrations against the immigration raids and military presence. Mayor Bass, flanked by two dozen local officials, reiterated her opposition to the federal response and urged demonstrators to remain peaceful. “We are here today because the raids have caused fear and panic,” she said.
Bass imposed a limited curfew over a one-square-mile downtown area in an effort to maintain order. “There is no termination date for the curfew,” she added. “We are hoping that if the cause of the turmoil ends—which is stopping the raids—then the curfew will go away in short order.”
Los Angeles County Sheriff Robert Luna acknowledged that the vast majority of protesters have remained peaceful. “Fewer than 1% of those present have caused problems,” Luna said, though he confirmed some arrests for assault, looting, and vandalism. Law enforcement has drawn a sharp line between lawful protest activity and criminal behavior, vowing to protect peaceful gatherings while taking swift action against acts of violence.
What’s at stake: constitutional norms and political precedent
The deployment of Marines and the detention of a U.S. citizen—particularly a military veteran—have fueled fears of federal overreach and militarization of civil governance. Former officials, including defense analysts and veterans’ advocacy groups, have warned that such tactics threaten the apolitical character of the U.S. armed forces and could undermine trust in federal institutions.
Senator Bernie Sanders and Senator Jack Reed publicly condemned the deployment, calling it an “abuse of power” and “a grave constitutional misstep.” Veterans groups, such as Common Defense, have described the incident involving Leao as a “troubling symbol of what happens when the military is weaponized for political optics.”
Public reaction has been divided. A Reuters/Ipsos poll released late Friday showed 48% of Americans support the use of military forces to maintain order during civil unrest, while 41% oppose it. Supporters of the President argue that troop deployment is necessary to maintain stability, but critics see it as an attempt to intimidate political opponents and suppress dissent.
National protests timed with Trump’s military parade
More than 1,800 protests are expected across the United States on Saturday, many of them organized under the theme “No Kings,” a direct reference to what opponents perceive as Trump’s authoritarian instincts. The centerpiece of Saturday’s events will be the Washington D.C. military parade, featuring tanks, flyovers, and troops marching in celebration of the U.S. Army’s 250th anniversary.
Trump has publicly called the event a “show of strength” and promised a “very big force” on the streets of the capital. Critics argue that the parade, coinciding with a major protest day, is a deliberate provocation.
The President’s actions have drawn comparisons to autocratic displays of power and triggered legal responses. The State of California filed an emergency injunction to halt the deployment, citing violations of both state jurisdiction and civil liberties. Although a federal judge initially sided with the state, the 9th Circuit temporarily overruled that decision late Friday, allowing the military presence to remain in place pending further hearings.
Broader implications for democracy and civil-military relations
The implications of Friday’s events extend beyond the streets of Los Angeles. Constitutional law scholars argue that the situation represents a critical test of how far executive power can extend in domestic affairs. The appearance of active-duty Marines in an American city, detaining a civilian—even temporarily—has alarmed those who see it as a dangerous erosion of democratic checks and balances.
Allies abroad are also watching closely. Human rights organizations and foreign governments have raised concerns over the U.S. approach to dissent and protest, noting that the use of military power in civil settings undermines the country’s democratic image globally.
Veterans organizations and civil liberties groups have begun coordinating response actions, including mass mobilizations, legal aid for detainees, and possible class-action lawsuits challenging the constitutionality of the detentions.
Future outlook: Will this expand to other cities?
With tensions expected to remain high, observers fear that Los Angeles could be a harbinger of broader federal crackdowns in other metropolitan areas where protests are intensifying. Cities like Chicago, New York, and Atlanta are also preparing for large demonstrations on Saturday, and state officials in Illinois and New York have already begun coordinating legal responses should military deployments expand.
For now, the federal government has not confirmed any plans to send troops beyond California. But analysts warn that the response to Saturday’s protests—both from demonstrators and the federal government—could determine whether this becomes a singular flashpoint or a turning point in how America balances security, protest, and the rule of law.
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