Black Sunday refers to a particularly severe dust storm that occurred on April 14, 1935, as part of the Dust Bowl.
The Montgomery bus boycott was a political and social protest campaign against the policy of racial segregation on the public transit system of Alabama.
The Little Rock Nine was a group of nine African American students enrolled in Little Rock Central High School in 1957
The Friendship Nine was a group of African-American men who went to jail after staging a sit-in at a segregated McCrory's lunch counter in Rock Hill.
Freedom Riders were civil rights activists who rode interstate buses into the segregated southern United States in 1961.
The March on Washington for Jobs and Freedom was held in Washington, D.C. on Wednesday, August 28, 1963.
The 16th Street Baptist Church bombing was an act of white supremacist terrorism which occurred at the African-American 16th Street Baptist Church in Birmingham, Alabama on Sunday, September 15, 1963.
The Selma to Montgomery marches were three protest marches, held in 1965, along the 54-mile highway from Selma, Alabama.
The Watts riots took place in the Watts neighborhood of Los Angeles from August 11 to 16, 1965.
The Orangeburg massacre refers to the shooting of protesters by South Carolina Highway Patrol officers in Orangeburg, South Carolina.