DEPARTMENT OF DEFENSEThe President, as the Commander in Chief, headsthe military chain of command within the Departmentof Defense (DoD). The Commander in Chief is keptabreast of all matters affecting the ability of the DoD todefend the United States and its allies. Figure 5-1shows the DoD chain of command.The DoD is responsible for providing the militaryforces needed to deter war and protect the security ofour country. As of 1999, the major elements of theseforces are the Army, Navy, Marine Corps, and AirForce, consisting of approximately 1.4 million menand women on active duty. They are backed, in case ofemergency, by the approximately 1.5 million membersof the Reserve and National Guard. In addition, thereare about approximately 742,000 civilian employees inthe Defense Department.The DoD is comprised of the offices of theSecretary of Defense (SECDEF), the Joint Chiefs ofStaff (JCS) and their supporting establishments (theDepartments of the Army, Navy, and Air Force), andvarious unified and specified commands. The DoDcarries out the military policies of the United States. Itsfunction, simply stated, is to maintain and employarmed forces to accomplish the following:5-2DEPARTMENT OF THE ARMYSECRETARY OF THE ARMYUNDERSECRETARYANDASSISTANTSECRETARIESOF THE ARMYCHIEFOFSTAFFARMYDEPARTMENT OF THE AIR FORCESECRETARY OF THE AIR FORCEUNDERSECRETARYANDASSISTANTSECRETARIESOF THEAIR FORCECHIEFOFSTAFFAIR FORCEDEPARTMENT OF THE NAVYSECRETARY OF THE NAVYUNDERSECRETARYANDASSISTANTSECRETARIESOF THE NAVYCHIEFOFNAVALOPERATIONSCOMMANDANTOFMARINECORPSINSPECTOR GENERALOFFICE OF THESECRETARY OF DEFENSEUNDER SECRETARIESASSISTANT SECRETARIESOF DEFENSEAND EQUIVALENTSMARINECORPSMAJORCOMMANDSANDAGENCIESAIR FORCEMAJORCOMMANDSANDAGENCIESNAVYMAJORCOMMANDSANDAGENCIESARMYMAJORCOMMANDSANDAGENCIESMASTERCHIEFPETTYOFFICEROF THENAVYBALLISTIC MISSILE DEFENSE ORGANIZATIONDEFENSE ADVANCED RESEARCH PROJECTS AGENCYDEFENSE COMMISSARY AGENCYDEFENSE CONTRACT AUDIT AGENCYDEFENSE FINANCE AND ACCOUNTING SERVICEDEFENSE INFORMATION SYSTEMS AGENCYDEFENSE INTELLIGENCE AGENCYDEFENSE LEGAL SERVICES AGENCYDEFENSE LOGISTICS AGENCYDEFENSE SECURITY COOPERATION AGENCYDEFENSE SECURITY SERVICEDEFENSE THREAT REDUCTION AGENCYNATIONAL IMAGERY AND MAPPING AGENCY*NATIONAL SECURITY AGENCY/CENTRAL SECURITYSERVICE**Reports directly to the Secretary of DefenseDEFENSE AGENCIESDOD FIELD ACTIVITIESAMERICAN FORCES INFORMATION SERVICESDEFENSE POW/MP OFFICEDEPARTMENT OF DEFENSE EDUCATION ACTIVITYDEPARTMENT OF DEFENSE HUMAN RESOURCESACTIVITYOFFICE OF ECONOMIC ADJUSTMENTTRICARE MANAGEMENT ACTIVITYWASHINGTON HEADQUARTERS SERVICESUNIFIED COMBATANT COMMANDSCENTRAL COMMANDEUROPEAN COMMANDPACIFIC COMMANDSOUTHERN COMMANDSPACE COMMANDSPECIAL OPERATIONS COMMANDSTRATEGIC COMMANDTRANSPORTATION COMMANDU.S. JOINT FORCES COMMANDJOINT CHIEFS OF STAFFCHAIRMAN,JOINT CHIEFS OF STAFFTHE JOINT STAFFVICE CHAIRMAN,JOINT CHIEFS OF STAFFCHIEF OF STAFF, ARMYCHIEF OF NAVAL OPERATIONSCHIEF OF STAFF, AIR FORCECOMMANDANT,MARINE CORPSSECRETARY OF DEFENSEDEPUTY SECRETARY OF DEFENSEPRESIDENT(COMMANDER IN CHIEF)MRLf0501Figure 5-1. DoD chain of command.Q1.What article of the Constitution provides thatthe executive power shall be vested in aPresident of the United States?1.V2.II3.III4.IVREVIEW QUESTION
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