Per chevron Gules and Azure, a chevron engrailed at top Or, between in chief two lightning bolts in chevron reversed and in base six wavys issuant from nombril point, three to dexter and three to sinister, of the third; overall a wheat stalk palewise throughout of the last, emitting nine spears, counterchanged Or and Gules.
WE WILL SUPPORT.
The chevron represents support; the branch assigned. The engrail against the red background alludes to red smoke, for chemical. The yellow wavys on blue background suggests the decontamination service. The wheat stalk refers to the bakery services provided by the battalion. The spears denote readiness to respond to any designated mission.
The coat of arms was approved effective 18 September 2006, for the 100th Support Battalion.