The last time the National Guard was activated without a governor’s permission was in 1965, when President Lyndon B. Johnson sent troops to protect a civil rights march in Alabama.

The military has activated about 700 active-duty Marines who could be sent to Los Angeles, joining National Guard troops who were sent to the city to respond to protests, U.S. Northern Command said in a statement.

In announcing the lawsuit, Attorney General Rob Bonta called the president's move to federalize the National Guard an "infringement" on state sovereignty.

A relative state of calm in Los Angeles began to crumble early Sunday afternoon as demonstrators confronted federal authorities guarding a downtown detention facility where chaos erupted as National Guard soldiers deployed tear gas on an increasingly agitated crowd.

U.S. officials said about 1,000 National Guard members were in the city under federal orders by midday Monday.

Trump's escalation of immigration arrests by shifting into workplaces ignited clashes between protesters and officers in the immigrant-heavy city.

Los Angeles residents and experts say that the National Guard's presence in Los Angeles in response to immigration protests is reminiscent of a longstanding dynamic in the state and around the country.

The former vice chief of the National Guard has denounced President Donald Trump’s deployment of troops in Los Angeles as “bad for all Americans concerned about freedom of speech and states’ rights.” Trump made the extraordinary decision to send 2,