The 11th Ohio Battery was organized in St. Louis, Missouri October 27, 1861, and mustered in for a three-year enlistment under Captain Archibald G. A. Constable.
The battery was attached to Army of the West and Department of the Missouri to March 1862.
7th Division, Left Wing, XIII Corps, Department of the Tennessee, to December 1862.
Artillery, 2nd Division, VII Corps, Department of the Arkansas, to May 1864.
Garrison, Pine Bluff, Arkansas, 2nd Division, VII Corps, to November 1864.
Moved to Otterville, Mo., December 15, and duty there until February 2, 1862.
Yazoo Pass Expedition and operations against Fort Pemberton and Greenwood, March 11-April 5.
Movement on Bruinsburg and turning Grand Gulf April 25–30.
Bayou Fourche and capture of Little Rock September 10.
Duty at Little Rock until April 1864, and at Pine Bluff until October.