Protesters clash with supporters of Trump's military parade in Washington, D.C., as they disagree over the president's authoritarian intentions.

Coinciding with Trump's 79th birthday, the parade will feature tanks, bands and thousands of troops in honor of the Army’s 250th anniversary celebration.

U.S. Capitol Police arrested about 60 demonstrators Friday evening during a protest of the appearance of troops in Saturday’s Army celebration in Washington and at immigration protests in Los Angeles. More than 50 of those arrested were veterans, according to organizers.

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.

While many demonstrations against the Immigration and Customs Enforcement agency have been peaceful, with marchers chanting slogans and carrying signs, others have led to clashes with police who have sometimes used chemical irritants to disperse crowds. Hundreds have been arrested.