According to the INSCOM web page: The 308th MI Battalion conducts counterintelligence investigations, operations, collection and analysis to detect, exploit and neutralize foreign intelligence entities, international terrorism and insider threats to U.S. Army Forces, technologies, information and infrastructure.

The official lineage of the 308th MI Battalion from the Army Center of Military History is:[2] The official descriptions of the 308th's heraldic items as follows are from The Institute of Heraldry:[4] The shield is per saltire Argent and Azure (Oriental Blue), two griffin heads erased respectant of the first, in chief a compass rose Gules.

The compass rose alludes to the collection, analysis and dissemination of information and the worldwide capabilities of the unit.

A Silver color metal and enamel device 1+1⁄8 inches (2.9 cm) in height overall consisting of a shield blazoned: Per saltire Argent and Azure (Oriental Blue), two griffin heads erased respectant of the first, in chief a compass rose Gules.

Attached below and to the sides of the shield a Black tripartite scroll inscribed "GUARDIANS OF AMERICA" in Silver letters.