Rich was a leader in Caldwell County, Missouri, and fought in the Battle of Crooked River in 1838. His log house is the only structure from the Mormon period in 1836–38 in Caldwell County to have survived to this day. After the expulsion of the Latter Day Saints from Missouri, Rich settled in Nauvoo, Illinois, where he was made an original member of the Council of Fifty. He also served as a member of the Nauvoo High Council, and as a brigadier and major general in the Nauvoo Legion.