The Treaty Party's belief that removal was inevitable proved correct, and the Indians were forcibly removed to present-day Oklahoma in the late 1830s. The feud, however, continued after the arrival of the Cherokees in Indian Territory, partly because the Anti-Treaty Party blamed the Treaty Party for the infamous Trail of Tears on which so many of the Cherokees died of starvation, disease, and hardship. On June 21, 1839, the leaders of the Anti-Treaty Party met and pronounced a death sentence on Boudinot, Watie, and the two Ridges for their role in relinquishing the ancestral lands, which was considered a capital offense under "blood law."
The next day Boudinot and the two Ridges were killed by members of the Anti-Treaty Party, while Stand Watie survived an attempt on his life the same day and became the undisputed leader of the Treaty Party. During the next several years, the feud between the two factions intensified, as Watie's group, which included the infamous Starr family, sought revenge for the June 1839 killings. In 1842, Watie partially avenged the murders (as he considered the killings) when he killed a man named James Foreman, who had participated in the killing of Major Ridge. Both sides, however, continued to carry out raids against the other into the mid-1840s.
One chapter of my Two Civil War Battles of Newtonia discusses the removal of the Cherokees, the feud between the two factions, and how the feud carried over even into the Civil War. Virtually all the sources I consulted in writing the chapter were secondary sources, but I recently ran across an 1846 newspaper article about an incident that represented an outbreaking or resumption of the feud. Under the headline "Another Indian Murder," the piece (which was reprinted in the Springfield Advertiser on March 14, 1846 from a prior issue of the Arkansas Intelligencer) reported that Ta-ka-tan-ka, leader of the police at the time James Starr was killed, had recently been killed himself. After briefly relating the contradictory reports concerning the exact circumstances of Ta-ka-tan-ka's killing, the newspaper journalist opined, "Again, we fear there will commence a series of murders by both parties. The friends of Ta-ka-tan-ka will certainly take revenge on some one, whether he be the real offender or not; and in return, the friends of Starr will be equally sure to kill some of the other party."