Heavily depleted by battle casualties, the much-reduced regiment nevertheless continued to participate in the major campaigns of the Army of the Potomac, by 1864 under the command of Ulysses S. Grant during the Overland Campaign. The remaining men participated in the battles of Wilderness, Spotsylvania Court House, Cold Harbor, and the Siege of Petersburg. By the time the regiment manned the breastworks around Petersburg, a lieutenant, George Randall, was in command as the senior officer still present for duty.