The 56th Theater Information Operations Group is a brigade-sized command of the United States Army National Guard based in Washington, and Maryland. In 2015 it took on the additional role as a major subordinate command in the Washington Army National Guard, aligning military intelligence and special operations forces under its command for administrative control.

Information Operations is a category of direct and indirect support operations for the United States Military. By definition in Joint Publication 3-13, "IO are described as the integrated employment of electronic warfare (EW), computer network operations (CNO), psychological operations (PSYOP), military deception (MILDEC), and operations security (OPSEC), in concert with specified supporting and related capabilities, to Information Operations (IO) are actions taken to affect adversary information and information systems while defending one's own information and information systems.