The Danites were a fraternal organization founded by Latter Day Saint members in June 1838, in the town of Far West, Caldwell County, Missouri. During their period of organization in Missouri, the Danites operated as a vigilante group and took a central role in the events of the 1838 Mormon War. They remained an important part of Mormon and non-Mormon folklore, polemics, and propaganda for the remainder of the 19th century, waning in ideological prominence after Utah gained statehood. Notwithstanding public excommunications of Danite leaders by the Church and both public and private statements from Joseph Smith referring to the band as being both evil in nature and a "secret combination", the nature and scope of the organization and the degree to which it was officially connected to the Church of Christ are not agreed between historians. Early in the group's existence, Joseph Smith appeared to endorse its actions, but later turned against it as violence increased and the actions of the Danites inspired a hysteria in Missouri that eventually led to the Extermination Order. According to an essay on the website of the Church of Jesus Christ of Latter-day Saints, "Historians generally concur that Joseph Smith approved of the Danites but that he probably was not briefed on all their plans and likely did not sanction the full range of their activities."

The 1838 Mormon War, also known as the Missouri Mormon War, was a conflict between Mormons and non-Mormons in Missouri from August to November 1838, the first of the three "Mormon Wars".