Shield
Gules, a fleur-de-lis Argent crowned Or; on a canton of the like an Aztec banner Vert garnished of the second.
Crest
On a wreath of the colors Argent and Gules, the shoulder sleeve insignia of the regiment Proper (a horizontal oblong of Black charged with the White star and Indian head of the Second Division).
Motto
NEC TEMERE NEC TIMIDE (Neither Rashly nor Timidly).
Shield
The single fleur-de-lis of silver is taken from the arms of Soissons, where the regiment performed such distinguished service that it was cited by the French in Orders of the Army, shown by the pendant Croix-de-Guerre. The regiment had its baptism of fire near Verdun, the arms of which have one fleur-de-lis crowned all gold. The crown on these arms is for Verdun. The canton carried the Aztec banner from the crest of the parent organization, the 3rd Field Artillery.
Crest
The crest of the 12th Field Artillery is self-explanatory.
The coat of arms was originally approved for the 12th Field Artillery Regiment on 24 June 1921. It was amended to include the motto on 16 August 1921. It was redesignated for the 12th Field Artillery Battalion on 13 February 1941. It was redesignated for the 12th Artillery Regiment on 10 February 1958. The insignia was redesignated effective 1 September 1971, for the 12th Field Artillery Regiment.