Rosa Parks was an important figure in the civil rights movement. In 1955, she refused to give up her seat to a white passenger on a segregated bus in Montgomery, Alabama, which was against the law at the time. Her act sparked the Montgomery Bus Boycott, where African Americans refused to ride the buses in protest. This boycott introduced Martin Luther King Jr. and brought national attention to the fight against segregation. Ultimately, the US Supreme Court ruled to outlaw segregation on city buses.