The 311th Theater Signal Command (TSC) is a Direct Reporting Command (DRC) of the United States Army Reserve Command (USARC) located at Ft. Meade, Maryland.

Headquartered in Richmond, VA, upon mobilization, the 80th Division will proceed to Fort McClellan, Alabama, and support expansion of the U.S. Army Training Center by conducting Basic Combat Training (BCT) and One Station Unit Training (OSUT) in Military Occupational Specialties (MOS) 54B (Chemical Operations Specialist) and MOS 95B (Military Police), using Mobilization Program of Instructions.

The mission of the 99th is exercising peacetime command and control of all assigned units. The 99th also provides full-service support to all Army Reserve units in its assigned area of operation. Another aspect of the 99th mission is supporting Army Reserve unit mobilizations during periods of crisis and war, as well as reconstituting units following demobilization and return to home station.