As the military presence ramped up in Los Angeles, communities are preparing for the largest protests against Trump since he took office.

United States Army North confirmed to ABC News that Marines at the Wilshire Federal Building have made the first temporary detention among the troops sent to Los Angeles on Friday.

The detention of the U.S. Army veteran and immigrant who obtained U.S. citizenship, punctuated a series of unusual events that have appealed to Trump supporters but outraged other Americans.

President Donald Trump kicked off an unprecedented military-style parade in Washington, D.C.—commemorating the Army’s 250th anniversary and his 79th birthday—as millions across the country took to the streets to protest, rallying against his expanded immigration raids and a spending bill projected to slash healthcare access for millions.

After a week of protests over federal immigration raids, about 200 Marines have moved into Los Angeles to guard a federal building and personnel in the city.

Demonstrators holds a signs during a “No Kings” protest, Saturday, June 14, 2025, in Atlanta. (AP Photo/Mike Stewart) Demonstrators gathered in parks and plazas across the U.S. to protest against President Donald Trump. The “No Kings” rallies were organized in nearly 2,000 locations nationwide, including cities, towns, and community spaces.

Authorities swept in with flash-bangs and tear gas grenades to disperse hundreds of protesters in Los Angeles.

U.S. Marines deployed to Los Angeles to help temper unrest in the city, stopped and detained an American citizen trying to enter a federal building.

U.S. Marines have moved into Los Angeles and will take over protecting the Wilshire federal building in the coming hours, the head of the military's efforts in the city said on Friday.