Edward C. Kuhn was an American heraldist and official U.S. Army artist who designed the first authorized coats of arms and distinctive unit insignia for the U.S. Army Coast Artillery Corps, Engineer Corps, Cavalry, Infantry, National Guard and other branches. An expert on flags, heraldry, embroidery, and military antiquities, Kuhn made significant contributions to American military history. A number of Kuhn's paintings are included in the permanent collections of the White House, U.S. Naval Academy Museum and the Smithsonian Institution.

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 authorization of all DUIs.