The battery is referenced on a marker on the Antietam battlefield and two monuments at Gettysburg.

July Organized at Cincinnati, Ohio. Joined McClellan in West Virginia and attached to 3rd Brigade, Army of Occupation, West Virginia
July 6-17 West Virginia Campaign
September Moved to Cheat Mountain and duty there attached to Cheat Mountain District, West Virginia
October 3-4 Action at Greenbrier River
January 7 Blue’s Gap
January Moved to Washington, D. C., and duty there attached to Defenses of Washington, D. C.
March Ordered to the Virginia Peninsula. Attached to Artillery Reserve, Army of the Potomac
April 5-May 4 Siege of Yorktown
May Attached to 2nd Brigade, Horse Artillery, Artillery Reserve, 5th Army Corps
June 25-July 1 Seven days before Richmond
June 28-29 Bottom’s Bridge
July 1 Malvern Hill
July-August At Harrison’s Landing
August 16-23 Movement to Fortress Monroe, then to Alexandria
September 6-22 Maryland Campaign. Attached to Artillery Reserve, 5th Army Corps, Army of the Potomac
September 16-17
Battle of Antietam

Commanded by Lieutenant Marcus P. Miller (USMA 1858).

From the marker:

On the morning of the 17th, the Battery was in the field just east of Porterstown. About 3 P.M., under orders of Brigadier General Geo. Sykes, it reported to Major General Burnside and was put in position on the high ground east of the Rohrbach Lane, from which it overlooked and commanded the approaches to the stone bridge over the Antietam. The Battery was not actively engaged.

September 19 Shepherdstown Ford
October 30-November 19 Movement to Falmouth, Va.
December 12-15
Battle of Fredericksburg
April 27-May 6 Chancellorsville Campaign
May 1-6
Battle of Chancellorsville
May Attached to 1st Regular Brigade, Artillery Reserve, Army of the Potomac, Lieutenant Christopher F. Merkle transferred from Battery E.
June Attached to Artillery Brigade, 11th Army Corps, Army of the Potomac
June 11-July 24 Gettysburg Campaign
July 1-3
Battle of Gettysburg

Commanded by Lieutenant Bayard Wilkinson until he was mortally wounded on July 1st, when
Lieutenant Eugene A. Bancroft took command.

From the monuments on Howard Avenue and in the National Cemetery at Gettysburg:

July 1 Arrived at Gettysburg about 11 a.m. Advanced and took position two sections on Barlow’s Knoll the left section detached near Almshouse. Engaged Confederate Infantry and artillery on right and left. Lieut. Wilkeson fell early mortally wounded and the command devolved on Lieut. Bancroft.

The sections were compelled to change positions several times. Retired about 4 p.m. one section relieving a section of Battery I 1st Ohio on Baltimore Street in covering the retreat. About 5 p.m. took position on Cemetery Hill.

July 2 Moved to rear of Cemetery facing Baltimore Pike. In action at the Cemetery from 4.30 p.m. until 7 p.m.

July 3 About 2 p.m. two sections were engaged in the Cemetery until the repulse o the Confederates.

Casualties: killed 1 officer and 1 man, wounded 11 men, missing, 4 men.
Ammunition expended 1400 rounds.
31 horses killed.

September 24-October 3 Movement to Bridgeport, Ala. Attached to Army of the Cumberland
October 26-29 Reopening Tennessee River
November Attached to Artillery, 2nd Division, 4th Army Corps, Army of the Cumberland
November 23-25
Battle of Chattanooga, Tenn.

The battery was commanded by Lieutenant Merkle.

November 23 Bushy Knob
November 23-24 Orchard Knob
November 25 Mission Ridge
February Moved to Nashville, Tenn. and post duty
March Attached to 1st Division, Artillery Reserve, Dept. of the Cumberland
October Transferred to Battery “I” 4th Artillery
February Remounted as a Battery at Washington, D.C. and service in the Washington Defenses until August