Battery "K" 4th Regiment of Artillery was a light artillery battery that served in the Union Army during the American Civil War.
The battery was attached to Artillery Reserve, Army of the Potomac, August 1861 to June 1862.
Artillery Reserve, III Corps, Army of the Potomac, to August 1862.
Artillery Brigade, III Corps, to March 1864.
Artillery Brigade, II Corps, to June 1865.
Moved to Washington, D.C., August 1861, and duty there until March 1862.
Moved to Alexandria August 16–23, and duty there until November.
Operations on Orange & Alexandria Railroad November 10–12.
Operations at Rappahannock Bridge and Grove Church February 5–7, 1863.
Wapping Heights, Manassas Gap, July 23.
Dabney's Mills, Hatcher's Run, February 5–7, 1865.