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.
Loyalist feud
A second internal feud arose in 2002 when Johnny Adair and former politician John White were expelled from the UDA. Many members of the 2nd Battalion Shankill Road West Belfast Brigade, commonly known as 'C' Company, stood by Adair and White, while the rest of the organisation were involved with attacks on these groups and vice versa. There were four murders; the first victim being a nephew of a leading loyalist opposed to Adair, Jonathon Stewart, killed at a party on 26 December 2002. Roy Green was killed in retaliation. The last victims were John 'Grug' Gregg (noted for a failed attempt on the life of Gerry Adams) and Robert Carson, another Loyalist. Adair's time as leader came to an end on 6 February 2003 when south Belfast brigadier Jackie McDonald led a force of around 100 men onto the Shankill to oust Adair, who promptly fled to England. Adair's former ally Mo Courtney, who had returned to the mainstream UDA immediately before the attack, was appointed the new West Belfast brigadier, ending the feud.