Also known as a unit crest or DUI, a Distinctive Unit Insignia is worn by all Soldiers (except General Officers) in units that have been authorized to be issued the device. It is worn centered on the shoulder loops of the Army Green Service Uniform (AGSU) and the blue Army Service Uniform (ASU, Enlisted only) with the base of the insignia toward the outside shoulder seam. DUIs are not worn on the Dress variations of either uniform, however.
The Distinctive Unit Insignia of the 136th Regiment, Texas Army National Guard was first approved on 30 July 1953 for the 136th Tank Battalion, Texas National Guard. It was redesignated for the 124th Armor in the Texas Army National Guard on 9 September 1960, but the insignia was rescinded on 4 March 1976 and would be not reinstated and redesignated until July 2001, when it was approved for the 136th Regiment, Texas Army National Guard.
Yellow and green are used in the lower half of the unit crest’s shield to denote the organization’s status as an Armor unit when the insignia was approved (green and white were the unofficial Armor colors for several years before they were made official for a short period between 1947 and 1951 when they were replaced by yellow). A golden star on a red field represents Artillery units drawn from the Texas Army National Guard to form the 636th Tank Destroyer Battalion which was redesignated as the 136th Tank Battalion. Fleur-de-lis dotting the lower half of the shield are for numerous World War II campaigns in Europe, and the lightning flash symbolizes the striking power and speed of Armor.Full guidance on wear of the DUI is found in DA Pamphlet 670-1, Section 21-22, "Distinctive unit insignia" and 21–3(d) and (e), "Beret" and "Garrison Cap," respectively.
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The 136th Regiment is the unit that operates the Texas Army National Guard Regional Training Institute; a more accurate designation of the unit would be 136th Regiment Regional Training Institute or 136th Regiment (Combat Arms) (Regional Training Institute). Each state or territory has a Regional Training Institute designed to offer an alternate training location for any service member in any component of the Army (active-duty, Army National Guard, or Army Reserve).
Each RTI specializes in a variety of courses, and the 136th Regiment’s history as an Armored unit makes it especially suitable to host courses in Armor, Artillery, and Infantry MOS (Military Occupational Specialty) qualifications, a Noncommissioned Officer Education System (NCOES) program, and an Officer Candidate School. It also holds an annual contest for enlisted personnel to submit essays attempting to explain why the Regimental motto is “Tidal Triumph.”