As a military parade rolls through Washington, DC, on Saturday – President Donald Trump’s birthday – millions of Americans are expected to protest in what organizers predict will be the strongest display of opposition to Trump’s administration since he took office in January.

The military parade to mark the Army’s 250th anniversary and its convergence with President Donald Trump’s 79th birthday are combining to create a peacetime outlier in U.S. history.

All those arrested outside the U.S. Capitol will be charged with unlawful demonstration and crossing a police line, authorities said.

On Saturday, for the first time in more than 30 years, the U.S. military is holding a big parade. The event is intended to celebrate the 250th birthday of the Army and to remind Americans of their debt to men and women in uniform.

WASHINGTON (AP) — Eight years after President Donald Trump was dazzled by a grand military parade down the Champs-Élysées in Paris, he is finally getting a chance to try to top the spectacle.

A military parade​ through the streets of Washington, D.C., celebrates the U.S. Army's 250th anniversary on Saturday, June 14. These maps show the route.

President Donald Trump on Saturday is set to host a major military parade in Washington, celebrating the Army’s 250th anniversary and Flag Day.

Falling on Flag Day and Trump's birthday, the national day of protest is intended to help counter Trump's planned Washington, D.C. military parade.