Complex sentence: Those who were primarily forced out of Cincinnati by violence, fear, and inability to work generally settled in nearby towns or villages; the second group was an organized exodus of blacks, with many emigrating the distance of nearly 400 miles to the Canadian site.
Split into simpler sentences: Those who were primarily forced out of Cincinnati by violence, fear, and inability to work generally settled in nearby towns or villages. The second group organized as an exodus, with many emigrating the full distance of nearly 400 miles to the Canadian site.