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  2. United States Department of Defense - Wikipedia

    en.wikipedia.org/wiki/United_States_Department...

    United StatesArmed Forces. The United States Department of Defense (DoD, [2] USDOD, or DOD) is an executive branch department of the federal government of the United States charged with coordinating and supervising all agencies and functions of the U.S. government directly related to national security and the United States Armed Forces.

  3. Organizational structure of the United States Department of ...

    en.wikipedia.org/wiki/Organizational_structure...

    The President of the United States is, according to the Constitution, the Commander-in-Chief of the U.S. Armed Forces and Chief Executive of the Federal Government. The Secretary of Defense is the "Principal Assistant to the President in all matters relating to the Department of Defense", and is vested with statutory authority (10 U.S.C. § 113) to lead the Department and all of its component ...

  4. List of U.S. Department of Defense agencies - Wikipedia

    en.wikipedia.org/wiki/List_of_U.S._Department_of...

    Its main responsibilities are to control the Armed Forces of the United States. The department was established in 1947 and is currently divided into three major Departments—the Department of the Army, Navy and Air Force—and has a military staff of 1,418,542 (553,044 US Army; 329,304 US Navy; 202,786 US Marine Corps; 333,408 US Air Force). [1]

  5. United States Secretary of Defense - Wikipedia

    en.wikipedia.org/wiki/United_States_Secretary_of...

    The United States secretary of defense (SecDef) is the head of the United States Department of Defense, the executive department of the U.S. Armed Forces, and is a high-ranking member of the federal cabinet. [5][6][7] The secretary of defense's position of command and authority over the military is second only to that of the president of the ...

  6. Defense Intelligence Agency - Wikipedia

    en.wikipedia.org/wiki/Defense_Intelligence_Agency

    Central Security Service. v. t. e. The Defense Intelligence Agency (DIA) is an intelligence agency and combat support agency of the United States Department of Defense, specializing in defense and military intelligence. A component of the Department of Defense (DoD) and the Intelligence Community (IC), DIA informs national civilian and defense ...

  7. United States Department of War - Wikipedia

    en.wikipedia.org/wiki/United_States_Department...

    The United States Department of War, also called the War Department (and occasionally War Office in the early years), was the United States Cabinet department originally responsible for the operation and maintenance of the United States Army, also bearing responsibility for naval affairs until the establishment of the Navy Department in 1798, and for most land-based air forces until the ...

  8. List of components of the U.S. Department of Defense

    en.wikipedia.org/wiki/List_of_components_of_the...

    The chain of command leads from the president (as commander-in-chief) through the secretary of defense down to the newest recruits. [2] [3] The United States Armed Forces are organized through the United States Department of Defense, which oversees a complex structure of joint command and control functions with many units reporting to various commanding officers.

  9. United States Intelligence Community - Wikipedia

    en.wikipedia.org/wiki/United_States_Intelligence...

    intelligence.gov. The United States Intelligence Community (IC) is a group of separate U.S. federal government intelligence agencies and subordinate organizations that work both separately and collectively to conduct intelligence activities which support the foreign policy and national security interests of the United States.