Gules, a horseshoe Or.
That for the regiments and separate battalions of the Army Reserve: On a wreath of the colors 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.
SIC JURAT TRANSCENDERE MONTES (Thus He Swears To Cross The Mountains).
The shield is red for Artillery. In the year 1716, Governor Alexander Spotswood formed a company of thirty men for the purpose of crossing the mountains into West Virginia and exploring the territory. At the conclusion of the exploration the men were organized and made Knights of the Golden Horseshoe and were presented with small golden horseshoes. The horseshoe commemorates that event.
The crest is that of the U.S. Army Reserve.
The coat of arms was originally approved for the 375th Field Artillery Regiment on 27 April 1933. It was redesignated for the 375th Field Artillery Battalion on 21 October 1942. It was redesignated for the 375th Parachute Field Artillery Battalion on 20 January 1950. The insignia was redesignated for the 100th Regiment on 8 July 1960.