Lilburn Williams Boggs (December 14, 1796March 14, 1860) was the sixth Governor of Missouri from 1836 to 1840.
 He is now most widely remembered for his interactions with Joseph Smith and Porter Rockwell, and Missouri Executive Order 44, known by Mormons as the "Extermination Order", issued in response to the ongoing conflict between members of the Church of Jesus Christ of Latter Day Saints and other settlers of Missouri.
 Boggs was also a key player in the Honey War of 1837.
The Kirtland Camp was a migration company made up of several hundred Latter-day Saints that traveled from Kirtland, Ohio to northern Missouri in 1838.
 The group was led by the third-highest ranking priesthood quorum in the hierarchy of the Church of Jesus Christ of Latter-day Saints: the First Seven Presidents of the Seventies.
 Those who stayed with the main company to the end of the journey settled in Mormon communities in Daviess County, Missouri during the 1838 Mormon War and shortly afterwards were forced to evacuate the area due to conflicts with non-Mormon settlers in the region.
The Mormon War is a name that is sometimes given to the 1838 conflict which occurred between Latter-day Saints (Mormons) and their neighbors in the northwestern region of the US state of Missouri.
 This conflict is also sometimes referred to as the Missouri Mormon War to differentiate it from the Utah Mormon War (also known as the "Utah War") and the lesser known Illinois Mormon War.
Liberty Jail is a former jail in Liberty, Missouri, United States, where Joseph Smith, founder of the Latter-day Saint movement, and other associates were imprisoned from December 1, 1838, to April 6, 1839, during the 1838 Mormon War.
 Latter-day Saints sometimes described it as a "prison-temple" because of revelations received during Smith's imprisonment there, which are now recorded as sections 121, 122, and 123 of the LDS Doctrine and Covenants.
The Haun's Mill massacre (also Hawn's Mill massacre) was an event in the history of the Latter Day Saint movement.
 It occurred on October 30, 1838, when a mob/militia unit from Livingston County, Missouri attacked a Mormon settlement in eastern Caldwell County, Missouri, after the Battle of Crooked River.
 By far the bloodiest event in the 1838 Mormon War in Missouri, it has long been remembered by the members of the Latter Day Saint movement.
 While the spelling "Haun" is common when referring to the massacre or the mill where it occurred; the mill's owner used the spelling "Hawn" in legal documents.
The Battle of Crooked River was a skirmish between Latter Day Saints forces and a Missouri state militia unit from southeast of Elmira, Missouri in Ray County under the command of Samuel Bogart.
 The battle was one of the principal points of conflict in the 1838 Missouri Mormon War.
 Afterward the governor issued Missouri Executive Order 44, sometimes called the "Extermination Order," which led to the expulsion of the Mormons from Missouri.
Benjamin Holladay (October 14, 1819 – July 8, 1887) was an American transportation businessman responsible for creating the Overland Stage to California during the height of the 1849 California Gold Rush.
 Ben Holladay created a stagecoach empire and he is known in history as the "Stagecoach King".
 A native of Kentucky, he also was hired as a private courier to General Alexander Doniphan of Missouri.
 Doniphan refused point-blank to carry out orders to kill the Mormons during the 1838 Mormon War in Missouri.
 His transportation empire later included steamships and railroads in Oregon.
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.
 There is no evidence that the Danites existed after 1838.
 However, 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" (a derogatory term used in the Book of Mormon), the nature and scope of the organization and the degree to which it was officially connected to the Church of Jesus Christ of Latter Day Saints are a matter of some dispute among historians.
 Earlier in the band's existence, Joseph Smith appeared to endorse the group's actions, but later turned against them as violence increased and the actions of the Danites inspired a hysteria in Missouri that eventually led to the Extermination Order.
Missouri Executive Order 44, also known as the Extermination Order, was an executive order issued on October 27, 1838, by the Governor of Missouri, Lilburn Boggs.
 The order was issued in the aftermath of the Battle of Crooked River, a clash between Latter-day Saints and a unit of the Missouri State Militia in northern Ray County, Missouri, during the 1838 Mormon War.
 Claiming that Latter-day Saints had committed open and avowed defiance of the law and had made war upon the people of Missouri, Governor Boggs 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".
 The militia and other state authorities—General John B. Clark, among them—would use the executive order to expel the Mormons from their lands in the state following their capitulation, which in turn led to their subsequent migration to Nauvoo, Illinois.
Alexander William Doniphan (July 9, 1808 – August 8, 1887) was a 19th-century American attorney, soldier and politician from Missouri who is best known today as the man who prevented the summary execution of Joseph Smith, founder of the Latter Day Saint movement, at the close of the 1838 Mormon War in that state.
 He also achieved renown as a leader of American troops during the Mexican–American War, as the author of a legal code that still forms the basis of New Mexico's Bill of Rights, and as a successful defense attorney in the Missouri towns of Liberty, Richmond and Independence.

Question: After what battle was the Missouri Executive Order 44 issued that took place during the 1838 Mormon War?
Answer: Battle of Crooked River