A gold color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a gold compass star of eight points with a fleur-de-lis issuing from the apex and the star spattered with black billets, all in front of a gold saltire, and encircled between the arms of the saltire at the sides and base a blue scroll inscribed "SUPPLY IS OUR SERVICE" in gold letters.

The heraldic billets signify requisitions and indicate the unit’s effective supervision of stock control and processing supplies. The compass star additionally denotes the command and control aspects of the service performed by the Battalion. The saltire reflects solidarity and integrity while the fleur-de-lis refer to the organization’s original location in Jackson, Mississippi, which began as “LeFleur’s Bluff.”

The distinctive unit insignia was originally approved for the 365th Supply and Service Battalion on 13 December 1968.  It was redesignated for the 365th Support Battalion with the description revised effective 16 April 1994. The insignia was amended to modify the symbolism on 29 March 23.   

Shield

Buff, a saltire Gules, a mullet of eight, the top forming a demi-fleur-de-lis Or bearing nine billets Sable.

Crest

That for the regiments and separate battalions of the Army Reserve:  From a wreath Or and Gules, 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.

Motto

SUPPLY IS OUR SERVICE.

Shield.  Buff and scarlet are the colors traditionally associated with support. Gold is emblematic of honor and achievement. The heraldic billets signify requisitions and indicate the unit’s effective supervision of stock control and processing supplies. The compass star additionally denotes the command and control aspects of the service performed by the Battalion. The saltire reflects solidarity and integrity while the fleur-de-lis refer to the organization’s original location in Jackson, Mississippi, which began as “LeFleur’s Bluff.”    

Crest.   The crest is that of the United States Army Reserve.      

The coat of arms was approved for the 365th Support Battalion on 3 May 1994. The insignia was amended to modify the symbolism on 29 March 23.