 Among its line officers was Captain Jeremiah C. Sullivan, who would later rise to the rank of brigadier general.The 6th Indiana Volunteer Infantry was re-enlisted for three year service from the original regiment at Madison, Indiana, on September 20, 1861, by Colonel Thomas Turpin Crittenden.The regiment subsequently fought in the Battle of Shiloh, the Battle of Stones River, the Battle of Chickamauga, and the Battle of Resaca.