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  2. United States Department of Defense - Wikipedia

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

    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 the five U.S. armed services, the Army, Navy, Marines, Air Force, Space Force, the Coast Guard for some purposes, and related functions and agencies.

  3. The Defense Counterintelligence and Security Agency (DCSA) is a federal security and defense agency of the United States Department of Defense (DoD) that reports to the Under Secretary of Defense for Intelligence. [1]

  4. 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 ...

  5. United States Secretary of Defense - Wikipedia

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

    The Department of Defense is composed of the Office of the Secretary of Defense (OSD), the Joint Chiefs of Staff (JCS) and the Joint Staff (JS), Office of the Inspector General (DODIG), the Combatant Commands, the Military Departments (Department of the Army (DA), Department of the Navy (DON) & Department of the Air Force (DAF)), the Defense ...

  6. The Secretary of Defense and the Chain of Command, Explained

    www.aol.com/news/secretary-defense-chain-command...

    The secretary of defense controls the Department of Defense in the way a CEO controls a business. This is often referred to as “ man, train, and equip ,” or some variation of that.

  7. 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. It is headed by the Secretary of Defense . The department was established in 1947 and is divided into three major Departments—the Department of the Army , Navy and Air Force , as well as a number of other component organizations.

  8. United States Department of Homeland Security - Wikipedia

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

    Whereas the Department of Defense is charged with military actions abroad, the Department of Homeland Security works in the civilian sphere to protect the United States within, at, and outside its borders. Its stated goal is to prepare for, prevent, and respond to domestic emergencies, particularly terrorism. [19]

  9. United States Security Assistance Organizations - Wikipedia

    en.wikipedia.org/wiki/United_States_Security...

    Inform other Defense Department offices with security-assistance responsibilities of security assistance activities in host countries; Perform secondary functions, such as advisory and training services and negotiation on non-security assistance military matters; Perform command and administrative functions.