The Montgomery Bus Boycott achieved significant milestones in the struggle for civil rights, primarily demonstrating the power of collective action against racial segregation. Sparked by Rosa Parks' refusal to give up her bus seat, the boycott lasted for 381 days and involved thousands of African Americans who refused to use the buses in Montgomery, Alabama. It led to a Supreme Court ruling that deemed bus segregation unconstitutional. Moreover, the boycott galvanized the Civil Rights Movement, established Martin Luther King Jr. as a prominent leader, and showcased the effectiveness of nonviolent protest strategies in achieving social justice.