The 42nd Ohio Infantry Regiment was organized at Camp Chase in Columbus, Ohio September through November 1861 and mustered in for three years service on December 7, 1861, under the command of Colonel James Abram Garfield.
4th Brigade, Cumberland Division, District of West Virginia, Department of the Ohio, to November 1862.
3rd Brigade, 9th Division, Right Wing, XIII Corps, Department of the Tennessee, to December 1862.
3rd Brigade, 9th Division, XIII Corps, Army of the Tennessee, to February 1863.
3rd Brigade, 1st Division, XIII Corps, Department of the Gulf, to November 1863.
Plaquemine, District of Baton Rouge, Louisiana, Department of the Gulf, to March 1864.
2nd Brigade, 1st Division, XIII Corps, Department of the Gulf, to June 1864.
Evacuation of Cumberland Gap and retreat to the Ohio River September 17-October 3.
Assault and capture of Fort Hindman, Arkansas Post, January 10–11.
Movement on Bruinsburg, Mississippi and turning Grand Gulf April 25–30.
Siege of Jackson July 10–17, Moved to New Orleans, La., August 13.
Moved to Duvall's Bluff, Ark., September 15, and duty there until November.
Don Pardee - Commanded the 42 OVI in the assault on Vicksburg.