Hatfield–McCoy feud
Between 1880 and 1891, the feud claimed more than a dozen members of the two families. On one occasion, the governors of West Virginia and Kentucky even threatened to have their militias invade each other's states. In response, Kentucky Governor S. B. Buckner sent his Adjutant General Sam Hill to Pike County to investigate the situation. More than a dozen people died and at least 10 people were wounded. A few days after the New Year's Massacre, a posse led by Pike county deputy sheriff Frank Philipps rode out to track down Devil Anse's group across the border into West Virginia. The posse's first victim was Jim Vance, who was killed in the woods after he refused to be arrested. Philipps then made other successive raids on Hatfield homes and supporters and captured three before cornering the rest in Grapevine Creek on 19 January. Unfortunately for Philipps, Devil Anse and other Hatfields were waiting for them with an armed group of their own. A battle ensued between the two parties, and the Hatfields were eventually apprehended. Two Hatfield supporters were killed, and a deputy, Bill Dempsey, was executed by Frank Philipps after they surrendered. Wall Hatfield and eight others were arrested and brought to Kentucky to stand trial for the murder of Alifair McCoy (sometimes spelled Allaphare, Randolph's young daughter), killed during the New Year's Massacre.
Yuma War
As result of the peace, the Cocopah cut their alliance with the Yuma and conflict broke out in May 1853. First the Cocopahs besieged three Yuman villages, killing Chief Macedon, four other warriors and ten women and children. Twelve prisoners were taken and a herd of Yuman horses captured. Cocopahs then massacred Chief Jose Maria's camp, killing three men and twenty-three women and children. Heintzelman noted that this massacre was an "unprovoked aggression on part of the Cocopah". A burial detail was formed and sent to the scene of the attack, within Mexican territory and present day Arizona. The bodies were burned according to American tradition and then the detail returned to the fort. Days later, Chief Maria arrived at Fort Yuma and informed Heintzelman that the high Cocopah chief had released some Yuman women and children but the majority were still in captivity. Maria also told the captain that the Cocopah were retreating into the mountains and that the Yuma were preparing their own raid in retaliation.