Also referred to as a unit crest or a DUI, the Distinctive Unit Insignia of the U.S. Army Medical Department Activity (MEDDAC), Fort Huachuca was originally approved for Raymond Bliss Army Hospital on 19 May 1970. It was subsequently redesignated to U.S. Army MEDDAC, Fort Huachuca on 30 August 1973.
The insignia’s predominant colors of maroon and white (silver) are the branch colors for the U.S. Army Medical Service and units in its six specialty corps. Two of the pioneering achievements of Major General Raymond Bliss, the Army Officer for whom the hospital at Fort Huachuca was originally named, are commemorated on the insignia. A pair of wings alludes to the Aerial Evacuation of Casualties, while the green lozenge (diamond shape) is a reference to Preventive Medicine, simulating the emerald found in the rings worn by Medieval physicians that was thought to keep disease at bay.
A maroon cross, symbol of assistance and medical care, is superimposed over a white (silver) chevron that is a also a stylized representation of a mountain, while the white and blue wavy bands behind it form an emblem for water; taken together, they visually recreate the Apache-Chiricahua Indian word “Huachuca,” which in English means “mountains with water” and of course is a reference to the organization’s home of Fort Huachuca, Arizona. “Service For Health” is the organization’s motto.
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The 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.
Full guidance on wear of the DUI is found in DA Pamphlet 670-1,
Section 21-22, "Distinctive unit insignia."