Cochise County in the Old West Cochise County feud or the Earp–Clanton feud, which included the historic Gunfight at the O.K. Corral in the town of Tombstone and Wyatt Earp's Vendetta Ride in the early 1880s. Dr. George E. Goodfellow famously described Tombstone, the capital of Cochise County, as the "condensation of wickedness." The land that now comprises Cochise County, along with the rest of modern Arizona south of the Gila River and a small part of southwestern New Mexico, was Mexican territory until 1853, when it was purchased by the United States in the Gadsden Purchase. Cochise County was created on February 1, 1881 from
Gunfight at the O.K. Corral accuracy. These works include: David Williams and Paul McIlroy introduced a mathematical model for the O.K. Corral gunfight, which they published in "Bulletin of the London Mathematical Society" (1998). Later this model was analyzed by Sir John Kingman (1999, 2002), and Kingman and Volkov (2003). They analyzed the probability of "survival of exactly S gunmen given an initially fair configuration." Gunfight at the O.K. Corral The Gunfight at the O.K. Corral was a 30-second shootout between lawmen and members of a loosely organized group of outlaws called the Cowboys that took place at about 3:00 p.m. on Wednesday, October 26,