High Quality Content by WIKIPEDIA articles! The Mormon War is a name sometimes given to the 1838 conflict which occurred between Latter Day Saints (Mormons) and their neighbors in the northwestern region of the U.S. 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. The specific dates of the war are from August 6, 1838 (the Gallatin election battle) to November 1, 1838 when Joseph Smith surrendered at Far West. During the conflict 22 people were killed (3 Mormons and 1 non-Mormon at Crooked River and 18 Mormons at Haun s Mill).