Answer
Three Cochise County Cowboys were killed in the Gunfight at the O.K. Corral. The cowboys were Billy Clanton, Tom McLaury, and Frank McLaury. They were killed by Wyatt Earp, Virgil Earp, Morgan Earp, and Doc Holliday. The Earps and Holliday were lawmen in Tombstone, Arizona, and the cowboys were outlaws. The gunfight started when the cowboys rode into town and started firing at the Earps and Holliday.