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  2. United States Department of the Navy - Wikipedia

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

    The United States Department of the Navy (DON) is one of the three military departments within the Department of Defense of the United States of America.It was established by an Act of Congress on 30 April 1798, at the urging of Secretary of War James McHenry, to provide a government organizational structure to the United States Navy (USN). [1]

  3. 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.

  4. United States Navy - Wikipedia

    en.wikipedia.org/wiki/United_States_Navy

    The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the world's most powerful navy with the largest displacement , at 4.5 million tons in 2021. [ 9 ]

  5. List of Department of Defense appointments by Joe Biden

    en.wikipedia.org/wiki/List_of_Department_of...

    Department of Defense Press Secretary. Patrick S. Ryder [6] August 4, 2022 — — Chief of Staff to the Secretary of Defense Derek Chollet [7] July 19, 2024 — Kelly Magsamen [4] January 20, 2021 June 28, 2024 [8] — Director of Administration and Management. Michael B. Donley [9] May 5, 2021 September 18, 2023 — General Counsel of Defense ...

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

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

    The Pentagon, headquarters of the United States Department of Defense.. The United States Department of Defense (DoD) has a complex organizational structure.It includes the Army, Navy, the Marine Corps, Air Force, Space Force, the Unified combatant commands, U.S. elements of multinational commands (such as NATO and NORAD), as well as non-combat agencies such as the Defense Intelligence Agency ...

  7. 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 all agencies and functions of the U.S. government directly related to national security and the United States Armed Forces.

  8. United States Armed Forces - Wikipedia

    en.wikipedia.org/wiki/United_States_armed_forces

    The United States Armed Forces is composed of six coequal military service branches. Five of the branches, the United States Army, United States Marine Corps, United States Navy, United States Air Force, and United States Space Force, are organized under the Department of Defense's military departments.

  9. United States Secretary of the Navy - Wikipedia

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

    The secretary of the Navy (SECNAV) is a statutory officer (10 U.S.C. § 8013) and the head (chief executive officer) of the Department of the Navy, a military department within the United States Department of Defense. By law, the secretary of the Navy must be a civilian at least five years removed from active military service.