The 61st Ohio Infantry Regiment was organized at Camp Chase in Columbus, Ohio and mustered in for three years service on April 23, 1862,[1] under the command of Colonel Newton Schleich.
[2] The regiment was attached to 1st Brigade, 3rd Division, I Corps, Army of Virginia, June to September 1862.
1st Brigade, 3rd Division, XI Corps, Army of the Potomac, to October 1862.
2nd Brigade, 2nd Division, XI Corps, to November 1862.
1st Brigade, 3rd Division, XI Corps, Army of the Potomac, to October 1863.
3rd Brigade, 1st Division, XX Corps, Army of the Cumberland, to March 1865.
[4] Ordered to western Virginia May 27, and joined Fremont's army at Strasburg, Va., June 23, 1862.
Pope's Campaign in northern Virginia August 16-September 2.
[4] Duty at Stafford Court House until April 27.
Duty along Orange & Alexandria Railroad July 26 to September 26.
Battles about Dallas, New Hope Church, and Allatoona Hills, May 25-June 5.
Operations about Marietta and against Kennesaw Mountain June 10-July 2.
Expedition from Atlanta to Tuckum's Cross Roads October 26–29.