The civil rights movement gained momentum in the 1950s and 1960s through important Supreme Court cases like Brown v. Board of Education, which banned racial segregation in schools, and civil rights protests and demonstrations across the South led by Martin Luther King Jr. and groups like the SCLC and SNCC. This period saw key events like the Montgomery Bus Boycott, Freedom Rides, and March on Washington. However, violence and opposition from groups like the KKK persisted, as seen in the murders of Medgar Evers and the four girls in the 16th Street Baptist Church bombing. Major civil rights legislation was passed in 1964 and 1965, including the Civil Rights Act and Voting Rights Act, but divisions grew within the movement,