Department of Defense
August 1, 2002
Certified Current as of November 21, 2003
Functions of the Department of Defense and Its Major Components
DoD Directive 5100.1, subject as above, September 25, 1987 (hereby
Title 10, United States Code
DoD Directive 5158.1, "Organization of the Joint Chiefs of Staff and
Relationships with the Office of the Secretary of Defense," May 1, 1985
Title 5, United States Code, Appendix, "Inspector General Act of 1978,"
through (ae), see enclosure 1
REISSUANCE AND PURPOSE
Cancels reference (a).
Promulgates the functions of the Department of Defense and its major
components according to 10 U.S.C. (reference (b)).
ORGANIZATIONAL RELATIONSHIPS IN THE DEPARTMENT OF DEFENSE
All functions in the Department of Defense and its component agencies are
performed under the authority, direction, and control of the Secretary of Defense.
The Department of Defense is composed of the Office of the Secretary of
Defense (OSD), the Military Departments, the Chairman of the Joint Chiefs of Staff
(JCS), the Combatant Commands, the Inspector General of the Department of Defense,
the Defense Agencies, the DoD Field Activities, and such other offices, agencies,
activities and commands established or designated by law, or by the President or by the