ShieldGules, a pale Argent charged with a palm tree Proper, in dexter fess a tower triple towered and in sinister a fleur-de-lis encircled by a garland of laurel all Or, within a bordure Gyronny of the last and of the first.
CrestThat for the regiments and separate battalions of the California Army National Guard: On a wreath of the colors Argent and Gules, the setting sun behind a grizzly bear passant on a grassy field all Proper.
MottoRIEN A PAS BEAU (Nothing Is In Vain).
ShieldThe red shield is for Artillery; the Spanish castle is for the Philippine service of the 250th Coast Artillery Regiment in the Spanish-American War; the palm tree is for service in the Philippine Insurrection; and the wreathed fleur-de-lis is for World War I; while the border indicates the descent of the 536th Field Artillery Battalion from the 250th Coast Artillery.
CrestThe crest is that of the California Army National Guard.
The coat of arms was originally approved for the 536th Field Artillery Battalion on 15 February 1945. It was redesignated for the 718th Antiaircraft Artillery Gun Battalion and amended by the addition of the California Army National Guard crest on 11 December 1951. It was rescinded on 26 June 1961.