Thousands of 'No Kings Day' protests are expected to take place across the nation Saturday, with the 'flagship' protest planned for Philadelphia.

Thousands are expected to pack the parkway for the "No Kings" protest. Organizers said they believe Philadelphia's demonstration will be among the largest in the country.

Organizers designated Philadelphia as the lead city in a movement spanning the nation, with over 2,000 protests planned.

The event was one of more than 2,000 “No Kings” rallies held across the country on Saturday, protesting what organizers call “authoritarianism, billionaire-first politics, and the militarization of our democracy.

In a city known as the cradle of American democracy, an impassioned, hourslong protest filled the streets for a ‘No Kings Nationwide Day of Defiance.’

An armed man was arrested on Saturday in the area of a "No Kings" rally in West Chester, Pennsylvania, police said.

At least one demonstration, about 70 miles from Washington, D.C., in Northern Virginia, was met with violence when a man intentionally drove an SUV through a crowd of departing protesters, striking at least one person,

The largest "No Kings" protest on June 14 is expected to take place in Philadelphia as a nod to the country's history and to avoid accusations that protesters are opposing the Army parade in the nation's capital, organizers have said.