Also known as a unit crest or DUI, 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 (ASU, 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.
Full guidance on wear of the DUI is found in DA Pamphlet 670-1,
Section 21-22, "Distinctive unit insignia."
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Commonly called a unit crest, the Distinctive Unit Insignia of the 34th Special Troops Battalion, 34th Infantry Division was approved on 26 June 2009 and consists of a shield into four unequal areas and a scroll of gold and blue inscribed with “Support The Attack,” the Battalion motto.
Doubtless the most eye-catching aspect of the insignia is a red “bovine” skull with a gold border taken from the 34th Infantry Division Shoulder Sleeve Insignia; its placement on a white pile (downward-pointing triangle) symbolizes military strength. Below the white pile is a light blue area that recalls the light-blue field of the Minnesota State Flag, while the two stars denote the fact that the Special Troops Battalion supports the 34th Infantry Divisional Command (i.e., the Division is commanded by two-star Major General). The curved gold flanches (flanks) of the light-blue area connote the high caliber of the unit’s personnel.
A key in the dark blue area is a reference to the Supply and Services function of a Special Troops Battalion, and the lightning bolt points to the Battalion’s communications mission and the speed at which it can be carried out.
Inactivated since early 2018, the Special Troops Battalion was assigned to the 34th Infantry Division’s Sustainment Brigade. In 2010, HQ and HQ Company, Special Troops Battalion was awarded a Meritorious Unit Commendation for outstanding performance in Iraq between April 2009 and February 2010 ensuring the preparedness of Iraqi Security Forces, assisting the Iraqi Government in promoting a growing economy and enhanced civil services, and generally setting the stage for a drawdown of U.S. military forces in the region.