ShieldGules, a distaff palewise Argent.
CrestThat for the regiments and separate battalions of the Rhode Island Army National Guard: From a wreath Argent and Gules an anchor palewise Or.
MottoFACTA PROBANT (Deeds Prove Us).
ShieldThe shield is red with the charge in white, representing the Engineer Corps colors, the original designation of the unit. The distaff is used to symbolize the city of Pawtucket, Rhode Island, reputed to be the birthplace of the textile industry and the city in which the first unit (Company A) of the 118th Engineer Regiment was organized.
CrestThe crest is that of the Rhode Island Army National Guard.
The coat of arms was originally approved for the 118th Engineer Regiment (Combat) on 6 May 1930. It was redesignated for the 118th Engineer Combat Battalion on 25 January 1952. The insignia was redesignated for the 118th Military Police Battalion on 6 January 1969. It was cancelled on 6 July 1972. It was reinstated for the 118th Military Police Battalion with the symbolism revised on 11 December 1996.