ShieldAzure, a bend wavy Argent, to base a Diamond Rattler gliding bendwise Proper.
CrestThat for the regiments and separate battalions of the Army Reserve: On a wreath of the colors Argent and Azure 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.
MottoON THE ALERT.
ShieldThe shield is blue for Infantry. The bend wavy represents the Kanawha River, the general district to which the organization was originally allocated, and the Diamond Rattler refers to the title given to military organizations in the State of West Virginia.
CrestThe crest is that of the United States Army Reserve.
The coat of arms was originally approved for the 398th Infantry Regiment, Organized Reserves on 9 October 1933. It was redesignated for the 398th Parachute Infantry Regiment on 16 December 1946. It was redesignated for the 398th Infantry Regiment, Organized Reserve Corps on 21 August 1952. The insignia was redesignated for the 398th Regiment on 30 October 1961.