The gang began harassing the Tunstall-McSween faction in 1876, often riding with the
Jesse Evans Gang and the
John Kinney Gang, with both those gangs also being employed by the Murphy-Dolan faction. On February 18, 1878, members of the Evans Gang led by
Jesse Evans killed John Tunstall, sparking the Lincoln County War. The
Lincoln County Regulators were formed shortly thereafter to counter the gunmen hired by Murphy-Dolan. The Regulators included
Billy the Kid,
Richard "Dick" Brewer,
Charlie Bowdre and
Doc Scurlock, but numbered some forty riders in all. On April 1, 1878, Sheriff Brady and Deputy Sheriff George Hindman were killed by
Billy the Kid and other Regulators in
Lincoln, New Mexico. On April 29, 1878, members of the Seven Rivers Gang killed Regulator
Frank McNab and badly wounded Regulator Ab Saunders, in addition to capturing
Frank Coe. On April 30, 1878, Seven Rivers members Tom Green, Charles Marshall, Jim Patterson and John Galvin were killed in Lincoln, and although the Regulators were blamed, that was never proven, and there were feuds going inside the Seven Rivers Warriors at that time. What is known for certain is that Seven Rivers member "Dutch Charlie" Kruling was shot and wounded by Regulator
George Coe on the morning of April 30. Some time after this, Seven Rivers gang member
Wallace Olinger allowed Frank Coe to escape, giving him a pistol in the process. The Regulators tracked down and killed Seven Rivers rider Manuel Segovia on May 15, 1878, who was believed to have killed McNab with a
shotgun. What would become known as the
Battle of Lincoln began on July 15, 1878, lasting five days, with Bob Beckwith being killed during a gun battle with the Regulators on July 19. For all practical purposes, the Lincoln County War ended after that siege, despite the fight itself being a draw and with all but one of the Regulators escaping. ==Downfall==