Family feuds in the United States had occurred on October 26, 1881, and was itself the climax of the Earp–Clanton family feud, simmering since the summer of 1880. Tensions between the Earps and both the Clantons and McLaurys increased through 1881, culminating in the historic gunfight. At the O.K. Corral, three deputized Earp brothers, Wyatt, Morgan and Virgil, along with Doc Holliday, had killed Billy Clanton, Frank McLaury and Tom McLaury. The Clanton and McLaury families were aligned with the "Outlaw Cowboys", a loosely knit outlaw group of families, friends and acquaintances then living in surrounding Cochise and Pima counties. The Earp Vendetta ride was a
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,