<P> 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 . </P>
<P> 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 . </P>
when did the supreme court rule that bus segregation was unconstitutional
when did the supreme court rule that bus segregation was unconstitutional
December 1956
December 1956