In the Battle of the Wilderness, Hardaway commanded his battalion in the corps of Lt. Gen. Richard S. Ewell in the portion of the artillery contingent led by Col. J. Thompson Brown. The battalion continued in that corps throughout the Overland Campaign. Hardaway’s guns were in the second line of Ewell’s corps at the Battle of Spotsylvania Court House, but some of them were moved up to the line of a gorge to contain the federal breakthrough on May 11. When the corps, led by Jubal Early left to defend Lynchburg, Virginia, Hardaway’s battalion remained behind. It was assigned to the defenses of Richmond, Virginia, reporting to Brig. Gen. Edward Porter Alexander. The battalion played a role in the Battle of Chaffin's Farm and spent much of late 1864 assigned to the defenses of Chaffin's Bluff.