Description/Blazon
<p>Shield
Azure, a fess rompu debased Argent, a pile with point in break of fess Or, seme-de-lis of the first charged with the shoulder sleeve insignia of the 93d Division Proper fimbriated of the third (a pellet charged with a French trench helmet, horizon blue outlined in Gold); in chief partly obscured by the pile on dexter side a Roman sword in pale point to base, on sinister side a prickly pear cactus, all Or.
Crest
That for the regiments and separate battalions of the Illinois Army National Guard: On a wreath of the colors Argent and Azure, upon a grassy field the blockhouse of old Fort Dearborn, all Proper.
Motto
ONE COUNTRY-ONE FLAG.
</p><p>Symbolism
Shield
The shield is blue for Infantry; the white fess rompu (broken) represents the Hindenburg Line, while the 370th Infantry (predecessor unit) is represented by the gold pile (wedge) which broke the line; the seme-de-lis is for the Oise-Aisne Operation which was in that province of France whose arms are a blue field with gold fleurs-de-lis ? the tinctures on the wedge being reversed so as not to get a blue pile on a blue field; the pellet with the helmet is the shoulder sleeve insignia of the 93d Division and indicates the service of the 370th Infantry as a unit of this Division during World War I, the gold Roman sword is taken from the Spanish War medal for non-combat duty, while the cactus represents duty on the Mexican Border.
Crest
The crest is that of the Illinois Army National Guard.
</p><p>Background
</p>
The coat of arms was originally approved for the 8th Infantry Regiment on 9 November 1925. It was redesignated for the 184th Field Artillery Regiment on 23 December 1940. It was redesignated for the 184th Field Artillery Battalion on 6 April 1950. The insignia was redesignated for the 178th Infantry Regiment on 13 June 1961.
US Army Institute of Heraldry
1925-11-09
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