During the Civil War, Benton Barracks was an encampment for Union troops and was located in north St. Louis County, 4-5 miles from the City of St. Louis.
The three Mann brothers of Fremont County, Iowa, were all soldiers in Company A of the 4th Iowa Volunteer Cavalry. Eldest brother, William enlisted on Oct. 2, 1861 at age 34. He was promoted to Veterinary Surgeon on Feb. 10, 1864 and was mustered out…