Battery "G" 2nd Regiment of Artillery was a light artillery battery that served in the Union Army during the American Civil War.
The battery was stationed at Fort Mackinac, Mackinac Island, Michigan, in May 1861 when it was ordered to Washington, D.C., and attached to Davies' Brigade, Miles' Division, McDowell's Army of Northeastern Virginia, June to August 1861.
Artillery, Franklin's Division, Army of the Potomac, to January 1862.
Artillery, Heintzelman's Division, Army of the Potomac, to March 1862.
Artillery, 3rd Division, III Corps, Army of the Potomac, to August 1862.
Artillery, 1st Division, IV Corps, Army of the Potomac, to September 1862.
Artillery, 3rd Division, VI Corps, Army of the Potomac, to May 1863.
2nd Brigade, Horse Artillery, Army of the Potomac, to June 1864.
1st Brigade, DeRussy's Division, XXII Corps, Defenses of Washington, D.C., south of the Potomac, to August 1865.
Dismounted June 2 and ordered to Washington, D.C. Duty in the defenses of that city until August 1865.