ShieldPer fess wavy Gules and Azure, in chief issuing from the partition line a demi-lion rampant Or.
CrestThat for the separate regiments and battalions of the Army Reserve: On a wreath of the colors Or 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.
MottoUNION FOR LIBERTY.
ShieldThe colors red and gold refer to the Spanish origin of Puerto Rico and the allocation of the Battalion to such territory. The blue wavy base represents the Infantry arm, while the lion symbolizes courage. The waves represent the fact that the organization is located beyond the continental limits of the United States.
CrestThe crest is that of the United States Army Reserve.
The coat of arms was approved on 10 December 1941. It was rescinded on 26 January 1959.
NOTE: The Battalion was never authorized a distinctive unit insignia.