The 300th Sustainment Brigade was originally created as the 300th Transportation Group and activated on 29 June 1945 in France. Inactivated a few months later (22 November 1945), the Group was redesignated as the 300th Transportation Corps Service Group in December 1946 and allotted the Organized Reserves (the became the Army Reserve in 1952. After a flurry of name changes, activations/inactivations, and relocations over the span of several decades , the unit at last received its current designation 2008. A major subordinate command of the 4th Expeditionary Sustainment Command, the 300th Sustainment Brigade is headquartered at Grand Prairie, Texas.
Approved on 11 December 2007, the 300th Sustainment Brigade Shoulder Sleeve Insignia is likely the source of the Brigade’s unofficial nickname of “Black Stallion” or “Black Horse.” Inside a shield divided into brick red and buff halves, a horse’s head in profile is superimposed on a yellow disc. The red and buff sections are the colors of three of the Brigade’s core component units: Ordnance, Quartermaster, and Transportation. The horse’s head is a nod to the Brigade’s lineage going back to the 300th Transportation Group in 1945.
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