A civil-rights protest during which African Americans refused to ride city buses in Alabama to protest segregated seating. The boycott took place from December 5, 1955, to December 20, 1956, and is regarded as the first large-scale U.S. demonstration against segregation. Four days before the boycott began, Rosa Parks, an African- American woman, was arrested and fined for refusing to yield her bus seat to a white man. The U.S. Supreme Court ultimately ordered the town to integrate its bus system, and one of the leaders of the boycott, a young pastor named Martin Luther King, Jr., emerged as a prominent leader of the American civil rights movement.