Gules, five fleurs-de-lis Or one, three, and one, on a chief embattled Azure fimbriated of the second a demi-sun issuant of the like.
That for the regiments and separate battalions of the Wyoming Army National Guard: From a wreath Or and Gules, an American bison statant Proper.
POWDER RIVER.
The red shield and the five gold fleurs-de-lis are for Artillery service in France. The chief is blue for Infantry service in the Philippines. The gold sun recalls both the Far Eastern service and the shoulder sleeve insignia of the 41st Division. The parting line is yellow for the Cavalry assignment of the regiment, and the line is made embattled recalling the fighting record of the old organization. The motto has been the battle cry and catch word of the regiment from its earliest days and through three wars.
The crest is that of the Wyoming Army National Guard.
The coat of arms was originally approved for the 115th Cavalry on 9 June 1924. It was redesignated for the 115th Cavalry Reconnaissance Squadron, Mechanized on 10 July 1944. The insignia was redesignated for the 300th Armored Field Artillery Battalion on 7 February 1952. It was redesignated for the 49th Artillery Regiment on 5 April 1961. It was redesignated for the 49th Field Artillery Regiment on 19 June 1972. It was redesignated effective 1 October 1996, for the 300th Field Artillery Regiment. The insignia was amended to correct the authorization of the insignia on 4 November 2004.