A Gold color metal and enamel device 1 1/8 inches (2.86 cm) in height overall consisting of a shield blazoned:  Vert, a saltire Or bearing a prickly pear cactus intertwined with a snake of the first, a chief erminois.  Attached below the shield a Gold scroll inscribed “LIBERTATIS CUSTODES” in Black letters.  

The insignia reflects the history of the 242d Tank Battalion, the former 2d Battalion of the 149th Infantry Regiment.  The design is the coat of arms of the Regiment differenced by a change of colors and by modification of the saltire and central charges.  The colors yellow and green are for Armor.  The saltire represents the unit’s Infantry origins.   Mexican War service is symbolized by the cactus and snake from the Mexican flag.  The chief is adapted from the ermine in the arms of both Brittany and Nantes, where the unit saw service in World War I.   

The distinctive unit insignia was originally approved for the 242d Tank Battalion on 6 July 1956.  It was redesignated for the 201st Engineer Battalion on 7 October 1960. It was amended to modify the symbolism on 24 May 2023.

Shield

Vert, a saltire Or bearing a prickly pear cactus intertwined with a snake of the first, a chief erminois.   

Crest

That for the regiments and separate battalions of the Kentucky Army National Guard:  On a wreath of the colors Or and Vert, within a garland of trumpet vine clasped hands clothed at the wrists all Proper.   

Motto

LIBERTATIS CUSTODES (Guardians Of Liberty).

Shield

The coat of arms eflects the history of the 242d Tank Battalion, the former 2d Battalion of the 149th Infantry Regiment.  The design is the coat of arms of the Regiment differenced by a change of colors and by modification of the saltire and central charges.  The colors yellow and green are for Armor.  The saltire represents the unit’s Infantry origins. Mexican War service is symbolized by the cactus and snake from the Mexican flag.  The chief is adapted from the ermine in the arms of both Brittany and Nantes, where the unit saw service in World War I.   

Crest

The crest is that of the Kentucky Army National Guard.

The coat of arms was originally approved for the 242d Tank Battalion on 6 July 1956.  It was redesignated for the 201st Engineer Battalion on 7 October 1960. It was amended to modify the symbolism on 24 May 2023.