Inez Milholland Boissevain (1886-1916) became the iconic Iron Jawed Angel on Horseback astride the white horse Gray Dawn as the lead Herald in the March 3, 1913, Suffrage Parade organized by Alice Paul, held in Washington, D.C., on the eve of the inauguration of President Woodrow Wilson. As the New York Times reported, she wore “a white broadcloth Cossack suit and long white-kid boots. From her shoulders hung a pale-blue cloak adorned with a golden Maltese cross.” On her head was a helmet crowned with the star of hope.
This image is from the Library of Congress. Take a closer look at her costume here.