Constituted 1 June 1921 in the National Guard of New Mexico and Colorado as the 111th Cavalry, and assigned to the
23rd Cavalry Division and organized from new and existing units as follows- • Headquarters organized and federally recognized 6 March 1924 at
Santa Fe, New Mexico. Headquarters Troop, 1st Regiment, New Mexico Cavalry at
Albuquerque (organized and federally recognized 26 July 1920 as Troop A, New Mexico Cavalry), redesignated Headquarters Troop 2 May 1922. • Service Troop organized and federally recognized 18 June 1923 at
Portales, New Mexico • Medical Department Detachment organized and federally recognized 29 July 1929 at Albuquerque, NM. • Headquarters 1st Squadron organized and federally recognized 12 October 1922 at Santa Fe, NM.; Relocated to
Roswell, New Mexico 1 March 1924. • Troop A, 1st Regiment, New Mexico Cavalry at
Estancia, New Mexico (organized and federally recognized 2 June 1921 as Troop F, New Mexico Cavalry; redesignated Troop A 1st Regiment, New Mexico Cavalry 28 September 1921), redesignated Troop A 2 May 1922. • Troop B, 1st Regiment, New Mexico Cavalry at
Carlsbad, New Mexico. (organized and federally recognized 28 July 1920), redesignated Troop B 2 May 1922. • Troop C, 1st Regiment, New Mexico Cavalry at
Deming, New Mexico. (organized and federally recognized 18 June 1921), redesignated Troop C 2 May 1922. • Headquarters 1st Separate Squadron, Colorado Cavalry at
Denver, Co. (organized 8 November 1880 at Denver as Headquarters 1st Battalion Colorado Cavalry; disbanded in 1886 at Denver; reorganized 9 June 1887 at Denver and disbanded 26 June 1889; reorganized 12 July 1897 as Headquarters 1st Separate Squadron, Colorado Cavalry; mustered into federal service 28 June 1916 at
Golden, Colorado for Mexican border; redesignated 17 October 1916 as Headquarters 2nd Squadron 1st Cavalry (provisional); mustered out 26 March 1916 at
Fort D. A. Russell, Wy.; redesignated 26 July 1917 as Headquarters 1st Squadron 1st Regiment Colorado Cavalry; drafted into federal service at Denver 5 August 1917; disbanded 14 October 1917; reorganized and federally recognized 14 June 1921 at Denver as Headquarters 1st Separate Squadron, Colorado Cavalry) redesignated Headquarters 2nd Squadron 1 November 1921. • Troop D, 1st Separate Squadron, Colorado Cavalry at
Monte Vista (organized and federally recognized 7 October 1920), redesignated Troop D 1 November 1921. • Troop E, 1st Separate Squadron, Colorado Cavalry at Denver (organized and federally recognized 25 February 1921), redesignated Troop E 1 November 1921. • Troop F, 1st Separate Squadron, Colorado Cavalry at Pueblo (organized and federally recognized 16 November 1920), redesignated Troop F 1 November 1921. Second Squadron redesignated 1 February 1922 as 1st Squadron, 117th Cavalry and new 2nd Squadron organized in New Mexico from new and existing units as follows- • Headquarters 2nd Squadron organized at Santa Fe and federally recognized 3 August 1923; relocated to Deming 9 August 1928 • Troop D, 1st Regiment, New Mexico Cavalry at Santa Fe (organized and federally recognized 11 April 1921), redesignated Troop E 10 June 1922. • Troop F, organized and federally recognized 11 May 1923 at
Silver City • Troop G, organized and federally recognized 26 June 1923 at Clayton. Reorganized 15 March as a three Squadron regiment; 3rd Squadron organized and federally recognized 14 July 1929 with Troop I at Carlsbad and Troop K at Taos. Relieved from the 23rd Cavalry Division, converted and redesignated as the
207th Coast Artillery (Antiaircraft) 26 April 1940. Redesignated on 1 July 1940 as
200th Coast Artillery (Antiaircraft). ==Distinctive unit insignia==