- Lineage
- Constituted 27 November 1917 in the National Army as Company C, 351st Infantry
- Organized 5 December 1917 at Camp Travis, Texas
- Demobilized 10 January 1919 at Camp Mills, New York
- Reconstituted 24 June 1921 in the Organized Reserves; concurrently allotted to the 90th Division (later redesignated as the 90th Infantry Division)
- Distinctive Unit Insignia
- Description: A Silver color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a shield blazoned: Per bend sinister Argent and Gules, two pine trees conjoined in base Proper. Attached below and to the sides of the shield are a wreath of red and white roses Proper and a motto scroll inscribed "READY."
- Symbolism: The red and white roses represent the State flower of Texas, the camp of organization. The red signifies the service of the company in World War I. The two trees represent the two battalions of the regiment. The motto is "Ready."
- Background: The distinctive unit insignia was approved on 28 August 1922.
- Coat of Arms
- Blazon
- Shield: Per bend sinister Argent and Gules, two pine trees conjoined in base Proper.
- Crest: That for the regiments and separate battalions of the Texas Army National Guard: On a wreath of the colors Or and Azure, a mullet of five points between two branches of live oak fructed Proper.
- Motto: READY.
- Symbolism
- Shield: The red and white roses represent the State flower of Texas, the camp of organization. The red signifies the service of the company in World War I. The two trees represent the two battalions of the regiment.
- Crest: The crest is that of the Texas Army National Guard.
- Motto: The motto is "Ready."
- Background: The coat of arms was approved on 28 August 1922.