21st U.S. Army Signal Brigade is a subordinate command of United States Army Network Enterprise Technology Command and the 9th Army Signal Command (NETCOM/9th ASC). The brigade originally activated as the U.S. Army Information System Test Command at Fort Ritchie, MD, July 6, 1988. The 1108th Signal Brigade was established April 1, 1989. In August 1993, the Brigade assumed new missions when the 7th Signal Command inactivated. In September 1998, the 1108th was relocated to Fort Detrick, MD, as a result of Base Realignment and Closure. The brigade was established as the 21st Signal Brigade October 16, 2003. The brigade provides and defends global information capabilities to enable joint and combined Battle Command across the full spectrum of operations from the President of the United States to the warfighter and other Federal Agencies. The BrigadeÕs subordinate units are the 7th Signal Center (South-TNOSC), and the 56th, 114th, and 302d Signal Battalions.