civil right movement By stratego16 May 21, 1954 Brown v. Board of education cause of Crisis at Little Rock May 21, 1954 Crisis at Little Rock effect of Brown v. Board of education May 21, 1955 Rosa Parks arrested May 21, 1956 Montgomery Boycott May 21, 1957 MLk starts Southern Christian Leadership Conference cause of Sit in's May 21, 1960 Sit in's effect of Southern Christian Leadership Conference May 21, 1961 Freedom Rides cause of Children's March May 21, 1963 Children's March effect of Freedom Rides May 21, 1963 "I have a Dream Speech" May 21, 1964 civil rights act of 1964 May 21, 1965 Voting Right act of 1965 May 21, 1965 Malcolm X assassination May 21, 1965 Selma to Montgomery/Bloody Sunday May 21, 1968 MLk assassination 1968 May 21, 1968 Civil Right Act of 1968