The largest military parade in Washington in decades unfolded Saturday alongside hundreds of protests against it, and its chief organizer

The procession featured more than 6,000 soldiers, 128 Army tanks, aircraft flyovers, military bands, even robot dogs. Troops wore uniforms representing the Army’s history, including outfits from the Revolutionary War, Civil War, World War II, the Vietnam War and the Global War on Terror.

For its 250th birthday, the Army put on the largest show of military might in the capital in more than three decades.