Office of the Secretary of Defense, Defense Agencies and DoD Field Activities Organization and Functions Guidebook

This Guidebook outlines the functions of the Office of the Secretary of Defense OSD, Defense Agencies, and DoD Field Activities. Where appropriate, the functional statement cites the pertinent Department of Defense DoD directive which charters the organization and provides more detailed information on the authorities, responsibilities, and functions of the organization. General information on the Military Departments, Chairman of the Joint Chiefs of Staff and Joint Staff, Armed Forces Policy Council, Unified and Specified Combatant Commands, and the Inspector General of the DoD is also provided.