Reorganized 31 October 1865 in the New Hampshire Volunteer Militia at Concord as the State Capitol Guards.

Reorganized 15 March 1877 in the New Hampshire Volunteer Militia at Concord as Company K (State Capitol Guards), 2d Regiment.

Redesignated 23 April 1924 as Headquarters Battery, 197th Coast Artillery (United States).

Organized 1 March 1877 in the New Hampshire Volunteer Militia at Concord as Company E (Pillsbury Light Guard), 2d Regiment.

Reorganized 14 April 1891 in the New Hampshire National Guard at Concord as Company E, 3d Regiment.

Reorganized and redesignated 15 June 1944 as Battery A, 744th Antiaircraft Artillery Gun Battalion.

Organized 17 March 1873 in the New Hampshire Volunteer Militia at Manchester as Company F (Governor Straw Rifles), 1st Regiment.

Consolidated 29 June 1921 with the Supply Company, First Army Headquarters Regiment (see ANNEX 4), and consolidated unit reorganized and federally recognized in the New Hampshire National Guard at Manchester as the Service Battery, 172d Field Artillery.

Reorganized and redesignated 1 March 1943 as Headquarters Battery, 172d Field Artillery Group.

Reorganized and redesignated 10 December 1943 as Headquarters Battery, XVI Corps Artillery.

Organized 24 June 1916 in the New Hampshire National Guard at Manchester as Field Hospital Company Number 1.

Reorganized and redesignated 25 August 1917 as Field Hospital Company Number 4, an element of the 26th Division.

Consolidated 12 April 1922 with the Sanitary Detachment, First Army Headquarters Regiment (see ANNEX 5), and consolidated unit reorganized and federally recognized in the New Hampshire National Guard at Manchester as the Medical Department Detachment, 172d Field Artillery.

Expanded, reorganized, and redesignated 1 March 1943 as the Medical Detachments, 172d and 941st Field Artillery Battalions.

Medical Detachment, 172d Field Artillery Battalion, inactivated 19 November 1945 at Camp Patrick Henry, Virginia; Medical Detachment, 941st Field Artillery Battalion, inactivated 23 November 1945 at Camp Myles Standish, Massachusetts.

Organized 8 October 1915 in the New Hampshire National Guard at Manchester as the Supply Company, 1st Infantry.

Reorganized and redesignated 11 February 1918 as the Supply Company, First Army Headquarters Regiment.

Organized 5 March 1917 in the New Hampshire National Guard at Manchester as the Sanitary Detachment, 1st Infantry.

Reorganized and redesignated 11 February 1918 as the Sanitary Detachment, First Army Headquarters Regiment.