Parks was the local NAACP chapter secretary, and her intentional defiance was designed to create a strong legal case against Jim Crow laws, not because she was physically tired.

To sustain the 381-day boycott, leaders organized a highly efficient carpool network using over 300 private cars and coordinated pick-up stations across the city.

Colvin refused to give up her seat nine months before Parks, but civil rights leaders worried her unmarried pregnancy would make her a vulnerable target for opposition smears.

Black residents constituted over 70% of Montgomery's paying bus passengers, meaning their 381-day absence nearly bankrupted the city's public transit system.