The Montgomery Bus Boycott, was a political and social protest campaign against the policy of racial segregation on the public transit system of Montgomery, Alabama. The campaign lasted from December 1, 1955, when Rosa Parks, an African American woman, was arrested for refusing to surrender her seat to a white person, to December 20, 1956, when a federal ruling, Browder v. Gayle, took effect, and led to a US Supreme Court decision that laws requiring segregated buses to be unconstitutional. MLK Jr. led boycott protests and became a national figure as a result.