Argent, a fleur-de-lis Gules; on a chief Azure eleven mullets, five and six, Or.
That for the regiments and separate battalion of the Delaware National Guard: On a wreath of the colors, Argent and Gules, a griffin's head erased Azure eared and beaked Or, langued Gules, collared Sable, fimbriated Argent and thereon three plates.
FIRST REGIMENT OF FIRST STATE
The shield is white, the old color of Infantry. The eleven mullets represent the eleven battles and campaigns in which the organization served during the Civil War, and the red fleur-de-lis is for World War I service. The red is also the color of the Coast Artillery.
The coat of arms was originally approved for the 198th Coast Artillery on 19 Jun 1933. It was redesignated for the 736th Antiaircraft Artillery Gun Battalion on 26 Jan 1951. On 6 Apr 1961, the insignia was redesignated for 198th Artillery. The coat of arms was redesignated for the 198th Signal Battalion on 19 Oct 1978.