Previously authorized for the Special Troops Battalion, 55th Brigade Combat Team, 28th Infantry Division, this Distinctive Unit Insignia (also known as a “unit crest” or DUI) is now worn by members of the 337th Engineer Battalion. It features a bifurcated shield of blue and gold to represent Infantry and Armor, the two regiments from which this unit is descended, with red used on the keystone and sword handle to represent sacrifice and valor.
The keystone commemorates the organization’s assignment to the 28th Infantry Division (Mechanized), while the castle wall denotes defense, protection, and strength. A sword is emblematic of the combat power of a warrior and represents the command and control of the various companies comprising unit when it was a Special Troops Battalion: Communications, Military Intelligence, and Engineers. A fleur-de-lis recalls the battle honors earned by ancestral units during World War I in France, while the star is for campaigns fought in World War II. “Fight Through” is the Battalion motto.
A component of the Pennsylvania Army National Guard, the 337th Engineer Battalion comprises its HQ Company, a Forward Support Company, a Signal Company, a pair of Engineer Companies, and a Fire Fighting Team.
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The Distinctive Unit Insignia is worn by all Soldiers (except General Officers) in units that have been authorized to be issued the device.
It is worn centered on the shoulder loops of the Army Green Service Uniform (AGSU) and the blue Army Service Uniform (Enlisted only) with the base of the insignia toward the outside shoulder seam. DUIs are not worn on the Dress variations of either uniform, however.
Enlisted personnel wear the insignia centered on a shoulder loop by placing it an equal distance from the outside shoulder seam to the outside edge of the shoulder-loop button. Officers (except Generals) wearing grade insignia on the shoulder loops center the DUI by placing it an equal distance between the inside edge of the grade insignia and the outside edge of the button.
More guidance on wear of the DUI is found in DA Pamphlet 670-1, Section 21-22, "Distinctive unit insignia" and 21–3(d) and (e), "Beret" and "Garrison Cap," respectively.