166th Aviation Brigade Unit Crest (To Deter and Defend)
These distinctive unit insignia (DUI) are worn by the 166th Aviation Brigade, with the motto "To Deter and Defend." Initially approved in 1991 for the 166th Aviation Group and redesignated in 1997, these unit crests are worn on both the Army Class A Uniform (Greens) and the Army Service Uniform (ASU).
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