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  2. United States Department of Defense - Wikipedia

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

    v. t. e. 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. 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 ...

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

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

    Department of Defense Agencies, Field Activities, and others. Defense Advanced Research Projects Agency (DARPA) Defense Commissary Agency (DeCA) Defense Contract Audit Agency (DCAA) Defense Contract Management Agency (DCMA) Defense Counterintelligence and Security Agency (DCSA) Defense Finance and Accounting Service (DFAS)

  6. Office of the Secretary of Defense - Wikipedia

    en.wikipedia.org/wiki/Office_of_the_Secretary_of...

    The Office of the Secretary of Defense (OSD) is a headquarters-level staff of the United States Department of Defense.It is the principal civilian staff element of the U.S. Secretary of Defense, and it assists the Secretary in carrying out authority, direction and control of the Department of Defense in the exercise of policy development, planning, resource management, fiscal, and program ...

  7. United States Department of the Army - Wikipedia

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

    The United States Department of the Army (DA) is one of the three military departments within the Department of Defense of the U.S. The Department of the Army is the federal government agency within which the United States Army (U.S.) is organized, and it is led by the secretary of the Army, who has statutory authority under 10 United States ...

  8. Ministry of defence - Wikipedia

    en.wikipedia.org/wiki/Ministry_of_defence

    A ministry of defence or defense (see spelling differences), also known as a department of defence or defense, is the part of a government responsible for matters of defence and military forces, found in states where the government is divided into ministries or departments. Such a department usually includes all branches of the military, and is ...

  9. United States Department of State - Wikipedia

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

    The United States Department of State (DOS), [3] or simply the State Department, [4] is an executive department of the U.S. federal government responsible for the country's foreign policy and relations. Equivalent to the ministry of foreign affairs of other nations, its primary duties are advising the U.S. president on international relations ...