 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.Consolidated 1 July 1940 with Headquarters Battery, 172d Field Artillery (organized and federally recognized 15 May 1936 at Manchester), and consolidated unit as Headquarters Battery, 172d Field Artillery.Inducted into federal service 24 February 1941 at Manchester.