After the Missouri militia was routed in the Battle of Crooked Creek , Governor Lilburn Boggs issued Missouri Executive Order 44 to evict the Mormons from the state . Three days later , a group from Livingston County killed 18 Mormons in the Haun 's Mill massacre . Troops laid siege to Far West , where Smith surrendered in October 1838 . The settlers agreed to leave ; they abandoned Far West and regrouped in Nauvoo , Illinois
Haun 's Mill massacre
Haun's Mill massacre
Caldwell County, Missouri