Thousands of people visited the National Mall in Washington, D.C., to see the rare spectacle of military hardware and soldiers filing down American streets.

President Donald Trump kicked off an unprecedented military-style parade in Washington, D.C.—commemorating the Army’s 250th anniversary and his 79th birthday—as millions across the country took to the streets to protest, rallying against his expanded immigration raids and a spending bill projected to slash healthcare access for millions.

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.