PHILADELPHIA (AP) — Cities large and small were preparing for major demonstrations Saturday across the U.S. against President Donald Trump, as officials urge calm, National Guard troops mobilize and Trump attends a military parade in Washington to mark the Army’s 250th anniversary.

A flagship “No Kings” march and rally are planned in Philadelphia, but no events are scheduled to take place in Washington, D.C., where the military parade will take place on Trump’s birthday.

The demonstrations are gaining additional fuel from protests flaring up around the country over federal immigration enforcement raids and Trump ordering National Guard troops and Marines to Los Angeles where protesters blocked a freeway and set cars on fire.

Police responded with tear gas, rubber bullets and flash-bang grenades while officials enforced curfews in Los Angeles and Democratic governors called Trump’s Guard deployment “an alarming abuse of power” that “shows the Trump administration does not trust local law enforcement.”

Governors and city officials vowed to protect the right to protest and to show no tolerance for violence.

Republican governors in Virginia, Texas, Nebraska and Missouri are mobilizing National Guard troops to help law enforcement manage demonstrations.

There will be “zero tolerance” for violence, destruction or disrupting traffic, and “if you violate the law, you’re going to be arrested,” Virginia Gov. Glenn Youngkin told reporters Friday.

In Missouri, Gov. Mike Kehoe issued a similar message, vowing to take a proactive approach and not to “wait for chaos to ensue.”

Nebraska’s governor on Friday also signed an emergency proclamation for activating his state’s National Guard, a step his office called “a precautionary measure in reaction to recent instances of civil unrest across the country.”

Organizers say that one march will go to the gates of Trump’s Mar-a-Lago resort in Florida, where Republican Gov. Ron DeSantis warned demonstrators that the “line is very clear” and not to cross it.

Governors also urged calm.

On social media, Washington state Gov. Bob Ferguson, a Democrat, called for peaceful protests over the weekend, to ensure Trump doesn’t send military to the state.

“Donald Trump wants to be able to say that we cannot handle our own public safety in Washington state,” Ferguson said.

In a statement Friday, Arizona Gov. Katie Hobbs, a Democrat, urged “protestors to remain peaceful and calm as they exercise their First Amendment right to make their voices heard.”

Pennsylvania Gov. Josh Shapiro, a Democrat, said his administration and state police are working with police in Philadelphia ahead of what organizers estimate could be a crowd approaching 100,000 people.

Philadelphia’s top prosecutor, District Attorney Larry Krasner, warned that anyone coming to Philadelphia to break the law or immigration agents exceeding their authority will face arrest. He invoked civil rights leader Martin Luther King Jr. as a guide for demonstrators.

“If you are doing what Martin Luther King would have done, you’re going to be fine,” Krasner told a news conference.

Some law enforcement agencies announced they were ramping up efforts for the weekend. In California, state troopers will be on “tactical alert,” which means all days off are cancelled for all officers.

Why is it called ‘No Kings’?

The “No Kings” theme was orchestrated by the 50501 Movement, to support democracy and against what they call the authoritarian actions of the Trump administration. The name 50501 stands for 50 states, 50 protests, one movement.

Protests earlier this year have denounced Trump and billionaire adviser Elon Musk. Protesters have called for Trump to be “dethroned” as they compare his actions to that of a king and not a democratically elected president.

Why are they protesting on Saturday?

The No Kings Day of Defiance has been organized to reject authoritarianism, billionaire-first politics and the militarization of the country’s democracy, according to a statement by organizers.

Organizers intend for the protests to counter the Army’s 250th anniversary celebration — which Trump has ratcheted up to include a military parade, which is estimated to cost $25 million to $45 million that the Army expects to attract as many as 200,000 people.

The event will feature hundreds of military vehicles and aircraft and thousands of soldiers. It also happens to be Trump’s 79th birthday and Flag Day.

“The flag doesn’t belong to President Trump. It belongs to us,” the “No Kings” website says. “On June 14th, we’re showing up everywhere he isn’t — to say no thrones, no crowns, no kings.”

What is planned at the ‘No Kings’ protests?

Protests in nearly 2,000 locations are scheduled around the country, from city blocks to small towns, from courthouse steps to community parks, organizers said.

Demonstrations are expected to include speeches and marches, organizers said in a call Wednesday. The group says a core principle behind all “No Kings” events is a commitment to nonviolent action, and participants are expected to seek to de-escalate any confrontation.

No weapons of any kind should be taken to “No Kings” events, according to the website.

How many people are expected to participate?

The No Kings Day of Defiance is expected to be the largest single-day mobilization since Trump returned to office, organizers said. Organizers said they are preparing for millions of people to take to the streets across all 50 states and commonwealths.