As can be seen from the census tables below, the county lost population from 1910 to 1920, and from 1930 to 1970. Part of the decline was related to the Great Migration, as millions of African Americans left the rural South and Jim Crow oppression for jobs and opportunities in industrial cities of the Midwest, North. From World War II on, primary migration destinations were West Coast cities because of the buildup of the defense industry. In addition, whites left rural areas for industrial jobs in the North, in cities such as Chicago and Detroit.