LOS ANGELES (AP) — About 90 members of the California National Guard and over dozen military vehicles like Humvees are helping protect immigration officers Monday as they carry out a raid in a Los Angeles park, defense officials said.

“That runs the gamut from making arrests, investigating crimes, and doing police work, all the way up to guarding prisoners or running courts,” says Daniel Maurer, an Army JAG until 2024 who also taught law at West Point and at the Judge Advocate General’s School in Virginia.

Heavily armed federal border agents and U.S. troops descended upon MacArthur Park in Los Angeles on Monday afternoon as part of an immigration raid that appeared to turn up mostly empty. The operation,