Black activists had begun to build a case to challenge state bus segregation laws around the arrest of a 15 - year - old girl, Claudette Colvin, a student at Booker T. Washington High School in Montgomery. On March 2, 1955, Colvin was handcuffed, arrested and forcibly removed from a public bus when she refused to give up her seat to a white man. At the time, Colvin was an active member in the NAACP Youth Council; Rosa Parks was an advisor. Colvin 's legal case formed the core of Browder v. Gayle, which ended the Montgomery bus boycott when the Supreme Court ruled on it in December 1956.
when did the supreme court rule that bus segregation was unconstitutional
December 1956