The Lincoln County War was an Old West conflict between rival factions which began in 1878 in Lincoln County, New Mexico Territory, the predecessor of the state of New Mexico, and continued until 1881. The feud became famous because of the participation of William H. Bonney ("Billy the Kid"). Other notable participants included Sheriff William J. Brady, cattle rancher John Chisum, lawyer and businessmen Alexander McSween, James Dolan and Lawrence Murphy.

The conflict began between two factions competing for profits from dry goods and cattle interests in the county. The older, established faction was dominated by James Dolan, who operated a dry goods monopoly through a general store referred to locally as "The House". English-born John Tunstall and his business partner Alexander McSween opened a competing store in 1876, with backing from established cattleman John Chisum. The two sides gathered lawmen, businessmen, Tunstall's ranch hands, and criminal gangs to their assistance. The Dolan faction was allied with Lincoln County Sheriff Brady and aided by the Jesse Evans Gang. The Tunstall-McSween faction organized their own posse of armed men, known as the Lincoln County Regulators, and had their own lawmen consisting of town constable Richard M. Brewer and Deputy US Marshal Robert A. Widenmann.

The conflict was marked by revenge killings, starting with the murder of Tunstall by members of the Evans Gang. In revenge for this, the Regulators killed Sheriff Brady and others in a series of incidents. Further killings continued unabated for several months, climaxing in the battle of Lincoln, a five-day gunfight and siege that resulted in the death of McSween and the scattering of the Regulators. Pat Garrett was named County Sheriff in 1880, and he hunted down Billy the Kid, killing two other former Regulators in the process.

The war was fictionalized by several Hollywood movies, including The Left Handed Gun in 1958, John Wayne’s Chisum in 1970, Sam Peckinpah's Pat Garrett and Billy the Kid in 1973 and Young Guns in 1988. Ron Hansen's novel The Kid (2016) and the television series Billy the Kid (2022–25) are also inspired by the Lincoln County War.

Background During November 1876, a wealthy Englishman named John Tunstall arrived in Lincoln County, New Mexico, where he intended to develop a cattle ranch, store, and bank in partnership with the young attorney Alexander McSween and cattleman John Chisum. At the time Lincoln County was dominated both economically and politically by Lawrence Murphy and James Dolan, the proprietors of LG Murphy and Co., later James J. Dolan and Co., the only store in the county. The factions were divided along ethnic and sectarian lines, with the Murphy faction being mostly Irish Catholic, while Tunstall and his allies were mostly English Protestant. LG Murphy and Co. lent thousands of dollars to the Territorial Governor, and the Territorial Attorney General eventually held the mortgage on the company.

Tunstall, McSween, and Chisum established a cattle business with the aim of supplying beef contracts in the territory. This venture further put them into conflict with Murphy and Dolan, who had already secured contracts to supply beef to both the Mescalero Apache Reservation and Fort Stanton. At that time, the latter's monopoly over the cattle industry was disliked by many farmers, who were forced to pay high prices to them while selling their cattle for low prices. Some settlers, however, sided against Tunstall, McSween and Chisum, due to recent violent events that happened during the Pecos War.DeArment, Robert K. (2009). Deadly Dozen: Twelve Forgotten Gunfighters of the Old West, Vol. 1 (Volume 1). OUP; Illustrated edition. pp. 115-116. ISBN 978-0806137537 In fact, the Seven Rivers Warriors, a collective of smaller ranchers who sided with Murphy and Dolan, formed during the Pecos War to oppose Chisum, who was the owner of a large cattle ranch. Such aspects of the Lincoln County War qualified it as a range war in the eyes of historians like Emerson Hough.Hough, Emerson (1897). The Story Of The Cowboy. Kessinger Publishing. p. 306. ISBN 978-1428609747 However, this is disputed by historians Francis and Roberta Fugate, who described it as competition over several other businesses more prominent than the minor cattle feud.Fugate, Francis and Roberta (1989). Roadside History of New Mexico. Mountain Press. p.306. ISBN 978-0878422425

The Fritz insurance policy The main event that resulted in the beginning of the Lincoln County War was controversy over the disbursement of Emil Fritz's insurance policy. Emil Fritz was a partner of L. G. Murphy. When he died in 1874, the executors of the estate hired Alexander McSween to collect his insurance policy. After collecting the policy, McSween refused to give the money to the executor of the estate because The House claimed that the money was owed to them as a debt and McSween suspected that the executor of the estate would give the money to them. McSween also knew how badly needy for cash The House was and as a business competitor was likely loath to have the money go to them, whether their claim was legitimate or not.

During February 1878, in a court case that was eventually dismissed, they obtained a court order to seize all of McSween's assets, but mistakenly included all of Tunstall's assets with those of McSween. Sheriff Brady formed a posse to attach Tunstall's remaining assets at his ranch 70 miles from Lincoln. Dolan also enlisted the John Kinney Gang, Seven Rivers Warriors and the Jesse Evans Gang, and their job was mainly to harass and rustle cattle from Tunstall's and Chisum's ranches, as well as being the faction's hired gunmen.

War On February 18, 1878, members of the Sheriff's posse caught up to Tunstall while he and his ranch-hands, Richard "Dick" Brewer, Billy the Kid, John Middleton, Henry Newton Brown, Robert A. Widenmann, and Fred Waite, were herding his last nine horses back to Lincoln. Frank Warner Angel, a special investigator for the Secretary of the Interior, later determined that Tunstall was shot in "cold blood" by Jesse Evans, William Morton, and Tom Hill.Record Group 60, NA In the Matter of the Cause and Circumstances of the Death of J.H. Tunstall, A British Subject 44-4-8-3 Tunstall's murder was witnessed from a distance by several of his men, including Richard Brewer and Billy the Kid. Tunstall's murder began the Lincoln County War. Tunstall's cowhands and other local citizens formed a group known as the Regulators to avenge his murder, since the territorial criminal justice system was controlled by allies of Murphy and Dolan. While the Regulators at various times consisted of dozens of American and Mexican cowboys, the main dozen or so members were known as the "iron clad", including McCarty, Richard "Dick" Brewer, Frank McNab, Doc Scurlock, Jim French, John Middleton, George Coe, Frank Coe, Jose Chavez y Chavez, Charlie Bowdre, Tom O'Folliard, Fred Waite (a Chickasaw), and Henry Newton Brown.

The Regulators set out to apprehend the sheriff's posse members who had murdered Tunstall. After the Regulators were deputized by the Lincoln County justice of the peace, together with Constable Martinez, they attempted to serve the legally issued warrants to Tunstall's murderers. Sheriff Brady arrested and jailed Martinez and his deputies in defiance of their deputized status. They gained release and searched for Tunstall's murderers, finding Buck Morton, Dick Lloyd, and Frank Baker. Morton surrendered after a five-mile (8 km) running gunfight on the condition that he and his fellow deputy sheriff, Frank Baker – who had no part in the Tunstall murder but was riding with Morton and Lloyd – would be returned alive to Lincoln. The Regulators' captain Dick Brewer assured them they would be taken to Lincoln, but other Regulators insisted on killing the prisoners.

Blackwater massacre

On March 9, 1878, the third day of the journey back to Lincoln, the Regulators killed McCloskey, Morton, and Baker in the Capitan foothills along the Blackwater Creek. They claimed that Morton murdered McCloskey and tried to escape with Baker, forcing them to kill the two prisoners. Few believed the story, as they thought it unlikely that Morton would have killed his only friend in the group. As the bodies of Morton and Baker each bore eleven bullet holes, one for each Regulator, Utley believes that the Regulators murdered them and killed McCloskey for opposing them. Nolan writes that Morton took ten bullets, and Baker was shot five times. That same day, Tunstall's other two killers, Tom Hill and Jesse Evans, were shot while trying to rob a sheep drover near Tularosa, New Mexico. Hill died and Evans was severely wounded. While Evans was at Fort Stanton for medical treatment, he was arrested on an old federal warrant for stealing stock from an Indian reservation.

Killing of William Brady Sheriff Brady asked for assistance from the Territorial Attorney General, Thomas Benton Catron, to end this "anarchy". Catron referred the topic to the Territorial Governor Samuel B. Axtell. The governor decreed that John Wilson, the Justice of the Peace, had been appointed illegally by the Lincoln County Commissioners. Wilson had deputized the Regulators and issued the warrants for Tunstall's murderers. Axtell's decree meant that the Regulators' actions, formerly considered legal, were now illegal. Axtell also was able to revoke Widenmann's status as a Deputy US marshal, making Sheriff Brady and his men the only law officers of Lincoln County.

On April 1, 1878, the Regulators French, McNab, Middleton, Waite, Brown and McCarty (Billy the Kid) made ready in the corral behind Tunstall's store before attacking Brady and his deputies on the main street of Lincoln. Brady died of at least a dozen gunshot wounds; Deputy George W. Hindman was also fatally wounded. McCarty and French broke cover and dashed to Brady's body, possibly to get his arrest warrant for McSween or to recover McCarty's rifle, which Brady had kept from a prior arrest. A surviving deputy, Billy Matthews, wounded both men with one bullet that passed through both of them. French's wound was so severe that he had to be temporarily harbored by Sam Corbet in a crawlspace in Corbet's house. Widenmann was also in the corral, but whether he participated was never ascertained: he claimed he was feeding Tunstall's dog.

Battle of Blazer's Mill

Three days after the murders of Brady and Hindman, the Regulators headed southwest from the area around Lincoln, reaching Blazer's Mill, a sawmill and trading post that supplied beef to the Mescalero Apaches. They came upon the rancher Buckshot Roberts, listed on their arrest warrant as one of Tunstall's murderers. Roberts met them outside, where Frank Coe, a neighbor of Roberts, tried to persuade him to surrender. But the latter refused due to fears of extrajudicial action from the Regulators. A gunfight ensued, with George Coe being wounded in the hand, while Roberts was hit in the stomach.

Roberts then retreated inside the mill and held his ground. The Regulators first attempted to rush Roberts, which only resulted with him knocking out Billy the Kid. Afterwards, they attempted to surround the house and fire from covered positions. Dick Brewer, who was shooting behind a log pile, was shot by Roberts in the eye, killing him. Several more Regulators were wounded. As the fight dragged on, the Regulators finally retreated, though Roberts died moments later from his wound.

Gunfight at Fritz Ranch After Brewer's death, the Regulators elected McNab as their captain. On April 29, 1878, Sheriff Peppin was directing a posse that included the Jesse Evans Gang and the Seven Rivers Warriors. They engaged in a shootout with the Regulators McNab, Saunders, and Frank Coe at the Fritz Ranch. McNab died in the gunfire, Saunders was badly wounded, and Frank Coe was captured.