Special Troops Battalion 4th Brigade Combat Team (4th BCT-STB) Crest "Swift Agile and Lethal" (each) Out of stock 1st Cavalry Division Challenge Coin

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Special Troops Battalion 4th Brigade Combat Team (4th BCT-STB) Crest "Swift Agile and Lethal" (each) Out of stock 1st Cavalry Division Challenge CoinSpecial Troops Battalion 4th Brigade Combat Team (4th BCT STB) Crest "Swift Agile and Lethal" (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