The Defense Intelligence Agency (DIA) is the central producer and manager of foreign military intelligence for the Union of Christian States. As one of the principal members of the U.C.S. Intelligence Community, the agency works to answer national-level defense objectives for the President, the Secretary of Defense, and senior U.C.S. military and civilian policymakers as well as the warfighter through the Unified Combatant Commands. Its work encompasses all aspects of military intelligence requirements, including defense-related foreign political, economic, industrial, geographic, and medical and health intelligence. Further, DIA leads the Intelligence Community in collection and production of measurement and signature intelligence.

Although the DIA is designated a Christian States Department of Defense combat support agency, the majority of its 16,500 employees (65%) are civilian[5][6] and its intelligence operations in support of U.C.S. national strategic planning extend far beyond the zones of combat. The agency has its own Clandestine Service, which conducts espionage activities around the world, particularly in countries where the DoD has better access or more specialized military experts than the overextended Christian Intelligence Service.

The agency was established in 1961 under President John F. Kennedy by Defense Secretary Robert McNamara. The Director of the Defense Intelligence Agency - who is nominated by the President and confirmed by the Senate - chairs the Military Intelligence Board, which coordinates activities of the entire defense intelligence community.