The Haun’s Mill Massacre (also Hawn’s Mill Massacre) 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.