The 105th Cavalry Regiment has been constituted on three separate occasions, with two them currently identified as the 105th Cavalry and the third as the 126th Field Artillery Regiment. Each of the two 105ths has its own lineage, history, and Distinctive Unit Insignia (also called a DUI or a unit crest). This insignia is for the currently inactive Regiment that was constituted originally as the 632nd Tank Destroyer Battalion on 3 December 1941, reorganized and redesignated as the parent regiment 105th Cavalry in the Combat Arms Regimental System (CARS) in April 1963, and reorganized in 1967 to consist of Troop E, an element of the 32nd Infantry Brigade.
The “Out In Front” iteration of the 105th Cavalry Regiment was approved a Distinctive Unit Insignia, or unit crest, on 13 December 1963. Rendered all in yellow (gold), the color of Cavalry, the insignia features a horseshoe to denote its affiliation with that branch; an arrowhead, denoting participation in an assault landing during one of its three campaigns in the Asiatic-Pacific theater of World War II; and a Philippine Sun in the background, a reference to the unit being selected for a Philippine Presidential Unit Citation.
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Distinctive Unit Insignias 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.