The 21st Signal Brigade’s mission is to provide Command, Control, Communications, and Computers (C4) systems support to the President, Secretary of Defense, Joint Chiefs of Staff, Department of Defense, Combatant Commanders and other Federal Agencies. To establish, operate, protect, and sustain the Army's CONUS (Continental United States) strategic portion of the Global Information Grid. To protect and provide for the well-being of our people. The Brigade is headquartered at Fort Detrick, Maryland and has three subordinate battalions: the 114th Signal Battalion located at Raven Rock Mountain Complex in Adams County, Pennsylvania; the 302d Signal Battalion headquartered at Fort Detrick, Maryland; and the 56th Signal Battalion headquartered at Joint Base San Antonio, Texas.
https://home.army.mil/detrick/index.php/units-tenants/21st-signal-brigade
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