Shield
Per fess Azure and Gules, on a fess Or a hand in armor grasping a bolt of lightning, both Vert.
Crest
On a wreath of the colors Or and Azure, issuing from a flame of six tongues, three to dexter and three to sinister, charged with an arrowhead Argent within a crescent Vert, the head of a mace formed by a Korean Taeguk.
Motto
HONOR, FIDELITY, COURAGE.
Shield
The shield is divided red and blue per fess, with a fess of gold thereon, which are the three colors of the shoulder sleeve insignia of the armored tank forces. The lightning bolt is symbolical of the striking power of the organization.
Crest
The six tongues of the flames represent the unit's six decorations. The crescent and arrowhead symbolize the Algeria-French Morocco and southern France assaults, World War II, and the colors red and green are used to represent the French Croix de Guerre awarded for the Italian campaigns. The mace in the arms of Colmar suggested the mace head to refer to that campaign. The Taeguk represents the Korean War and the three Republic of Korea Presidential Unit Citations from that nation. The mace also alludes to the striking power of armor.
The coat of arms was originally approved for the 756th Tank Battalion, Light on 15 May 1942. It was redesignated for the 756th Tank Battalion on 22 November 1943. The insignia was redesignated for the 73d Tank Battalion on 23 October 1953. It was redesignated for the 73d Armor on 19 March 1963. It was amended to add the crest on 15 December 1965. It was redesignated effective 25 February 2004, for the 73d Cavalry Regiment.