Buff and red are the colors traditionally used by Sustainment units. The saltire, symbolic of Saint Andrews Cross, symbolizes sacrifice. The mill rind, the heraldic symbol for the center of a millstone for grinding wheat, suggests support.
The shoulder sleeve insignia was approved effective 16 July 2007. The Symbolism was amended 13 July 2023 (TIOH Dwg. No. A-1-922)
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