The 73rd Field Artillery Regiment was originally organized in October 1918 in the Regular Army at Camp Jackson, South Carolina, as an element of the 22nd Field Artillery Brigade, the latter organized the previous month at Camp George G. Meade, Maryland.

[citation needed] The 4th Battalion, 73rd Artillery was deployed to help suppress the April 1968 Baltimore riots.

On a wreath Or and Gules, issuing from a snowbank Proper behind a caltrop Azure, the Dexter and sinister points each surmounting in base a caltrop counter bend-wise of the first, two cubit arms grasping the halves of a spear broken chevron-wise of the first.

The snow refers to the severe winter weather during the period the battalion made its stand against the German counter offensive and is symbolized by two arms breaking a spear.

The coat of arms was originally approved for the 73rd Armored Field Artillery Battalion on 17 March 1943.