The 15th Sustainment Brigade was a sustainment brigade of the United States Army based at Fort Bliss, Texas. It provided logistics support to other units of the United States Army, and was subordinate to the 13th Sustainment Command (Expeditionary). It previously had provided support to the 1st Cavalry Division, but now did so for the 1st Armored Division until 12 May 2015 when the 15th Sustainment Brigade became part of the 1st Armored Division and was renamed 1st Armored Division Sustainment Brigade.