In the 1950s and 1960s, the growing discontent among black Americans about their continuous mistreatment in the US culminated into the formation of the Civil Rights Movement. Actions led by African-Americans nationwide, such as in the court case "Brown vs. Board of Education", the Montgomery bus boycotts, the Little Rock Nine's enrollment in a segregated school, the Nashville sit-ins, and the Freedom Summer voter registration drive, helped spur federal action that slowly broke down racial segregation in the South and most were achieved through nonviolent means.