The 129th Ohio Infantry was organized at Camp Cleveland[1] near Cleveland, Ohio, and mustered in August 10, 1863, for six months service under the command of Colonel Howard D. John.
The regiment was attached to DeCourcy's Brigade, Willcox's Left Wing Forces, Department of the Ohio, to October 1863.
3rd Brigade, 2nd Division, IX Corps, Army of the Ohio, to January 1864.
Ordered to Camp Nelson, Ky. Skirmish at Barbourville, Ky., February 8.
The regiment lost 25 enlisted men during service, all due to disease.