The 189th Ohio Volunteer Infantry Regiment (189th O.V.I.) was organized at Camp Chase in Columbus, Ohio under the command of Colonel Henry D. Kingsbury and mustered in for one year service on March 4, 1865. Three days later, the regiment left for Huntsville, Alabama and arrived there on March 17th. It was attached to the District of North Alabama, Department of the Tennessee, to September 1865. The assigned duty was to guard bridges, buildings and stockades along the Memphis & Charleston Railroad until June. By June 20th, the regiment concentrated and was assigned post duty at Huntsville until September 25th.
After just six months and three weeks of active duty, the regiment was ordered back to Nashville, Tennessee and was mustered out of service on September 28, 1865. The regiment had only suffered 1 man killed (by rebel/civilian raiders) and 48 enlisted men died due to disease.
Excerpted and edited from Wikipedia, the free encyclopedia.