Battery G was organized in Cairo, Illinois and mustered in February 28, 1862, for a three-year enlistment under the command of Captain Arthur O'Leary.
The battery was attached to Flotilla Brigade, Army of the Mississippi, to April 1862.
Artillery, District of Corinth, XIII Corps, Department of the Tennessee, to December 1862.
Fort Pickering, District of Memphis, XVI Corps, to June 1864.
1st Brigade, Post and Defenses of Memphis, District of West Tennessee, to December 1864.
10, Mississippi River, and garrison at New Madrid, Missouri, March 20-April 11, 1862.