In the United States Department of Defense, executive civilian control over matters other than operations is exercised through the three service departments, the Department of the Army, the Department of the Navy (which includes the Marine Corps), and the Department of the Air Force. Each is led by a service secretary, who are below Cabinet rank. Civilian control of operational matters, by contrast, is exercised by the Secretary of Defense and his deputies.
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| Portal:Military of the United States |
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| Leadership |
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| Organization |
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Service Departments
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Branches
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| Structure |
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| Operations & History |
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| Personnel |
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| Equipment |
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| Legend: A=Army MC=Marine Corps N=Navy AF=Air Force CG=Coast Guard PHS=Public Health Service NOAA=National Oceanic and Atmospheric Administration MSC=Military Sealift Command |
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