Shield
Azure, a Spanish castle Gules door of the first and fimbriated Or between three six-pointed mullets one and two and debruised in base by a demi-sun issuing from base of the last.
Crest
That for the regiments and separate battalions of the North Dakota Army National Guard: From a wreath Or and Azure, a sheaf of three arrows Argent armed and flighted Gules behind a string bow fesswise Or with a grip of the second.
Motto
JE SUIS PRET (I Am Ready).
Shield
The service of the former organization, 142d Engineer Battalion, is indicated by the blue shield for Infantry, with the Spanish castle taken from the Spanish Campaign medal representing Spanish War service. The Philippine Insurrection service is indicated by the three mullets from the Philippine Island flag. The sun in base, from the 41st Division shoulder sleeve insignia, denotes World War I service with that division.
Crest
The crest is that of the North Dakota Army National Guard.
The coat of arms was originally approved for the 164th Regiment Infantry on 11 an 1933. It was redesignated for the 142d Engineer Battalion on 8 May 1956. On 26 Dec 1974 the coat of arms was rescinded (cancelled). The coat of arms was approved for the 164th Regiment, with description and symbolism revised, on 6 Nov 1997.