Azure (Oriental Blue) three plates two and one, on a chief dancetty of four three hurts fesswise.
That for the regiments and separate battalions of the Army Reserve: From a wreath Argent and Azure (Oriental Blue), the Lexington Minute Man Proper. The statue of the Minute Man, Captain John Parker (H.H. Kitson, sculptor), stands on the Common in Lexington, Massachusetts.
FROM DARKNESS TO LIGHT.
Oriental blue is the primary color traditionally used by Intelligence. The motto "FROM DARKNESS TO LIGHT," is referred to by charges. The designation of the unit, 321, is symbolized by the arrangement of the roundels. Argent (white) denotes integrity.
The crest is that of the U.S. Army Reserve.
The coat of arms was approved effective 16 September 1997.