3rd Ordnance Battalion distinctive unit insignia
U.S. Army
1942-08-26
The Institute of Heraldry<a rel="nofollow" class="external autonumber" href="http://www.tioh.hqda.pentagon.mil/Catalog/HeraldryMulti.aspx?CategoryId=8960&amp;grp=2&amp;menu=Uniformed%20Services">[1]</a>