 Complete the following phrase:  In the 1870s and 1880s there was considerable tension in the regionbetween the rural residents, who were for the most part Democrats from the agricultural South, and town residents and business owners, who were largely Republicans from the industrial Northeast and Midwest. The tension culminated in what has been called the Cochise County feud, and the Earp-Clanton feud, which ended with the historic Gunfight at the O.K. Corral and Wyatt Earps 