Constituted 1924 as 91st CA (HD) Regt (PS) and organized 1 July 1924 at Fort Mills. Organized by redesignating 281st, 282nd, 284th, 277th, 279th, 286th, 276th, &amp; 285th Cos, Philippine Scouts (organized 12-18-22) as HHB and Btrys A-G respectively. HHBs 1st and 2nd Bns activated 6-3-24 at Fort Mills. Initial disposition: Regimental HHB and Btrys A &amp; B stationed at Ft. Mills; Btrys C, D, &amp; E stationed at Fort Hughes; Btry F at Fort Frank, and Btry G at Fort Wint. Manned fixed and mobile seacoast guns. Redesignated TD regiment 1935. Surrendered 5-6-42 as Philippines campaign (1941–1942) ended. Disbanded 28 June 1950.