In 1864, the unit transferred back to the Eastern Theater where it fought at the Wilderness, Spotsylvania, Totopotomoy, and Cold Harbor.

The battery was attached to Robert C. Schenck's Brigade, Daniel Tyler's Division, Irvin McDowell's Army, Northeast Virginia in June–August 1861.

It served in Fitz John Porter's Division, Army of the Potomac from that date until March 1862.

[1] The battery was assigned to the 4th Brigade in Henry Jackson Hunt's Artillery Reserve at the time of the Battle of Seven Pines on 31 May–1 June, though it was not engaged in the fighting.

Transferring east, the unit became part of the Reserve Artillery, IX Corps, Army of the Potomac in March–June 1864.

[1] Commanded by Captain J. H. Carlisle, Battery E was armed with two 14-pounder James rifles and two M1841 6-pounder field guns.

Its guns were not among the 24 artillery pieces that crossed to the west bank of Bull Run with the assault brigades.

Battery E under the command of First Lieutenant Samuel Nicholl Benjamin fought at the Second Battle of Bull Run on 29–30 August 1862.

Together with the 8th Massachusetts Light Artillery, Battery E was part of the division of Isaac Stevens in the IX Corps led by Jesse L.

He recorded no casualties at Antietam and reported three officers and 97 enlisted men present for duty on 22 September.

[1] At the Battle of Fredericksburg on 13 December 1862, Battery E under Captain Benjamin's command served in George W. Getty's 3rd Division of the IX Corps under Orlando B.

[10] Benjamin complained in his after battle report about the "miserable quality of the ammunition" with which the battery was provided.

He admitted tossing 53 rounds of shell and shrapnel into a stream because the ammunition was visibly defective.

[13] During skirmishing on 18 November, the battery was asked to fire on some Confederate snipers in a house about 2,500 yd (2,286 m) distant.

Engineer officer Orlando Metcalfe Poe reported that Benjamin's gunner put a round into the room occupied by the snipers.

[17] Shortly afterward, Battery E was ordered to return to Washington, D.C. where it served as a garrison until October 1865.