ShieldVert, a demi-dinosaur (Tyrannosaurus) rampant couped Argent, eyed Gules, langued Azure holding in its sinister claw a sword erect of the second, enflamed Proper.
CrestOn a wreath Argent and Vert, behind a lion rampant Gules, armed and langued Azure, grasping a fir tree sinister bendwise eradicated of the first, a portcullis Sable cloué Argent.
MottoBY FORCE AND VALOR.
ShieldThe monstrous awe-inspiring, ferocious appearing dinosaur, with its scaly armored hide and dangerous tail capable of destroying everything in its path, is symbolic of the destroying functions of the organization, which is further enhanced by the flaming sword, representative of the zeal of the personnel in the performance of their duties.
CrestThe uprooted tree stands for the organization's action in the Hurtgen Forest in World War II, for which the Regiment was awarded the Distinguished Unit Citation. The lion is from the arms of Belgium. It stands for action in the Ardennes for which the unit was awarded the Belgian Fourragere. The portcullis with spikes stands for the fortifications of Europe; the five spikes are for the Regiment's five campaign credits. The portcullis and fir tree also stand for postwar service of Battalions of the Regiment in Germany and Alaska. The portcullis alludes to the Iron Curtain in Germany and the white fir to the snow-covered forests of Alaska.
The coat of arms was originally approved for the 40th Armored Regiment on 9 January 1943. It was redesignated for the 40th Tank Battalion on 22 November 1943. The insignia was redesignated for the 40th Armor Regiment on 27 March 1958. It was amended to add a crest on 26 April 1965. It was redesignated for the 40th Cavalry Regiment effective 16 October 2005.