The Silent Sentinels, also known as the Sentinels of Liberty, were a group of over 2,000 women in favor of women's suffrage organized by Alice Paul and the National Woman's Party, who nonviolently protested in front of the White House during Woodrow Wilson's presidency starting on January 10, 1917. Nearly 500 were arrested, and 168 served jail time. They were the first group to picket the White House. Later, they also protested in Lafayette Square, not stopping until June 4, 1919 when the Nineteenth Amendment to the United States Constitution was passed both by the House of Representatives and the Senate.

Alice Stokes Paul was an American Quaker, suffragist, feminist, and women's rights activist, and one of the foremost leaders and strategists of the campaign for the Nineteenth Amendment to the U.S. Constitution, which prohibits sex discrimination in the right to vote. Paul initiated, and along with Lucy Burns and others, strategized events such as the Woman Suffrage Procession and the Silent Sentinels, which were part of the successful campaign that resulted in the amendment's passage in August 1920.