It is assigned to the 71st Ordnance Group at Fort Carson, Colorado, which is under the 20th Chemical, Biological, Radiological, Nuclear, and Explosive (CBRNE) Command, Aberdeen Proving Grounds, Maryland.

A Gold color metal and enamel device 1+5⁄32 inches (2.9 cm) in height overall consisting of a shield blazoned: Gules, on a bend between a spur gear and a feather palm tree, Or, three torteaux.

The spur gear represents maintenance, and the palm tree is characteristic of the flora of the countryside where the battalion was organized, Monterey Bay, California.

Units: Attached Security Units: After HHC, 3d Ordnance Battalion and 60th Ordnance Company were inactivated on 29 April 1972, the last remaining unit (576th Ordnance Company) was assigned to the U.S. Army Supply Depot, Long Binh (USADLB) under whose command it continued to operate the Long Binh Ammunition Depot until all remaining stocks were transferred to the newly constructed ARVN ammunition supply point located in a former portion of the U.S. Army Long Binh Ammunition Depot (USLBAD).

Units: In 1990 the 3d Ordnance Battalion had the mission of removing 110,000 chemical projectiles (8" and 155mm nerve agent rounds) from Germany during Operation Steel Box.