The 201st Regiment Distinctive Unit Insignia is taken from the coat of arms that was originally approved for the 123rd Coast Artillery Battalion on 18 August 1942 and redesignated for the 123rd Antiaircraft Artillery Gun Battalion on 3 August 1951. In October 1997, the insignia was authorized for the 201st Regiment with the symbolism revised.
A Man-O-War bird struck by a spear represents the service of the 123rd AA Artillery Gun Battalion, with the threat effectively eliminated from the skies through vigilant defense from the ground. This is reinforced by the image of the watchtower of Castillo San Felipe del Morro, or El Morro, with the positioning of the stars reflecting the old Battalion’s numerical designation (rows of 1, 2, and 3 stars). DEFENDEREMOS NUESTROS CIELOS, the unit motto, translates in English as “We Will Defend Our Skies."
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Also known as a unit crest or DUI, the Distinctive Unit Insignia 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.