These laws were what started segregation. And the civil rights movement. A march in Washington by over 200,000 people in 1963 dramatized the movement to end Jim Crow. Southern whites often responded with violence and federal troops. They were needed to preserve order and protect blacks notability at the little rock in Arkansa. The most segregated places were. Texas,Oklahoma, Arkansa,Louisiana, Mississippi, Florida,South Carolina,Tennessee,north caroling, Virginia,West Virginia, Kentucky,Missouri.