Missouri Executive Order 44

Missouri Executive Order 44, also known as the "Mormon Extermination Order" (alt. exterminating order) in Latter Day Saint history, was an executive order issued on October 27, 1838 by the governor of Missouri, Lilburn Boggs. The directive was issued in the aftermath of the Battle of Crooked River, a clash between Mormons and a unit of the Missouri State Guard in northern Ray County, Missouri, during the Mormon War of 1838. Insisting that the Mormons had committed "open and avowed defiance of the laws", and had "made war upon the people of this State," Boggs precipitously directed that "the Mormons must be treated as enemies, and must be exterminated or driven from the State if necessary for the public peace—their outrages are beyond all description".

While the order is often referred to as the "Mormon Extermination Order" due to the phrasing used by Boggs, relatively few people were killed as a direct result of its issuance. However, the state militia and other authorities used Boggs' missive as a pretext to expel the Mormons from their lands in the state, and force them to migrate to Illinois. Mormons did not begin to return to Missouri until 25 years later, when they found a more welcoming environment and were able to establish homes there once more. In 1976, citing the unconstitutional nature of Boggs' directive, Missouri Governor Kit Bond formally rescinded it.