[1][2] The 22nd Ohio Infantry Regiment (Three Months Service) was organized at Camp Jackson in Columbus, Ohio April through May 1861 in response to President Lincoln's call for 75,000 volunteers and mustered into service on May 23, 1861.
[3] The regiment moved to Parkersburg, Virginia, May 30, then to Burning Springs, Elizabethtown, and to Three Forks.
It participated in operations against guerrillas in Gilmer, Calhoun and Braxton Counties and railroad guard duty until August.
[8] The regiment's designation was officially changed to the 22nd Ohio Volunteer Infantry on July 7, 1862.
2nd Brigade, District of Corinth, Mississippi, XIII Corps, Department of the Tennessee, to December 1862.
4th Brigade, District of Jackson, XVI Corps, Army of the Tennessee, to March 1863.
2nd Brigade, Kimball's Division, District of Eastern Arkansas, to August 1863.
2nd Brigade, 2nd Division, VII Corps, Department of Arkansas, to March 1864.
Box Ford, Hatchie River October 7 (3 companies).
Garrison at Trenton and duty along line of the Mobile & Ohio Railroad until March 1863.
Ordered to Camp Dennison, Columbus, Ohio, October 24.