503rd Airborne Infantry Unit Crest "The Rock" (each) majgen 39th Engineer Battalion Crest "Fight

39th Engineer Battalion Crest  "Fight Build And Destroy" (pair)

Explosive Ordinance Disposal OCP Patch with Hook Fastener

US Army Engineer Regimental Crest

I (1st) Corps OCP Patch W/ Hook Fastener

DUIs may also be called "distinctive insignia" (DI) or

503rd Airborne Infantry Unit Crest "The Rock" (each) majgen 39th Engineer Battalion Crest "Fight503rd Airborne Infantry Unit Crest "The Rock" (each). A distinctive unit insignia (DUI) is a metallic heraldic badge or device worn by soldiers in the United States Army. The DUI design is derived from the coat of arms authorized for a unit. DUIs may also be called "distinctive insignia" (DI) or, imprecisely, a "crest" or a "unit crest" by soldiers or collectors. The U. S. Army Institute of Heraldry is responsible for the design, development and