The Montgomery Bus Boycott began in 1955 when Rosa Parks was arrested for refusing to give up her seat to a white passenger on a segregated bus in Montgomery, Alabama. In response, the NAACP organized a boycott of the public bus system that lasted for over a year. The boycott was led by Martin Luther King Jr. and successfully protested the policy of racial segregation on public buses. In 1956, the US Supreme Court ruled that segregation on public buses was unconstitutional, marking a major victory for the Civil Rights movement.