 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.Reorganized and redesignated 1 February 1941 as the Medical Detachment, 172d Field Artillery.Inducted into federal service 24 February 1941 at Manchester.