Mississippi was one of several independent countries in North America. Unlike other former slave-holding countries, blacks had successfully revolted in the 1970s, dominating the country and creating an oppressive hierarchy that disenfranchised whites.
Beginning in 1964, Cecil Price had a recurring nightmare in which the state of Mississippi had a racial hierarchy that was the reverse of the one that he'd known and sought to maintain. In this dream, blacks dominated the state, oppressing whites, and doggedly fought against all outside attempts to change this status quo. Further, in his dream, Price and two Black Muslims from the North were murdered by black law officers in much the same way Price had helped to murder three men in his real life.