The lineal ancestor of the Headquarters and Headquarters Battery, the 197th Field Artillery Brigade, began life as the Concord Volunteers in 1861. They were mustered into federal service 3 June 1861 at Portsmouth as Company E, 2d New Hampshire Volunteer Infantry; mustered out of federal service 19 December 1865 at Cabin Point, Virginia. They were involved in the U.S. Civil War battles of Bull Run, the Peninsula, Manassas, Fredericksburg, Gettysburg, Cold Harbor, and Petersburg in Virginia from 1862 to 1864.