WSJ's senior political correspondent Molly Ball reports from the parade route, where vintage tanks and other military hardware are rolling down Constitution Avenue in Washington.

The parade was the spectacle event Trump had long wanted. It also helped sparked the largest mass opposition to him since his inauguration 145 days earlier.

The parade, honoring the Army’s long-planned 250th anniversary celebration and coinciding with Trump’s 79th birthday, is set to step off from the Lincoln Memorial under the threat of stormy weather in Washington and protests around the country tied to a turbulent week of immigration enforcement that has involved military deployment in Los Angeles.

Thousands of demonstrators crowded into streets, parks, and plazas across the US, blaring anti-authoritarian chants mixed with support for protecting democracy and immigrant rights.

President Trump is hosting a parade celebrating the 250th anniversary of the U.S. Army on Saturday, bringing tanks and soldiers to the streets of Washington, D.C., for the capital's first major military parade in more than three decades.

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.

The day-long celebration of the Army’s 250th birthday coincided with nationwide protests against Trump and military strikes between Israel and Iran that are testing the president’s “America First” resolve.