In the United States, state governments are institutional units exercising functions of government at a level below that of the federal government. Each U.S. state's government holds legislative, executive, and judicial authority over[1] a defined geographic territory. The United States comprises 50 states: 9 of the Thirteen Colonies that were already part of the United States at the time the Constitution took effect in 1789, 4 that ratified the Constitution after its commencement, plus 37 that have been admitted since by Congress as authorized under Article IV, Section 3 of the Constitution.[2]
https://en.wikipedia.org/wiki/State_governments_of_the_United_States
Legislative definitions of a federal agency are varied, and even contradictory. The official United States Government Manual offers no definition.[1][2] While the Administrative Procedure Act definition of "agency" applies to most executive branch agencies, Congress may define an agency however it chooses in enabling legislation, and through subsequent litigation often involving the Freedom of Information Act and the Government in the Sunshine Act. These further cloud attempts to enumerate a list of agencies.[3][4]
https://en.wikipedia.org/wiki/List_of_federal_agencies_in_the_United_States
United States Department of Defense

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Agency overview
Formed 18 September 1947; 75 years ago (as National Military Establishment)
Preceding agencies
Department of War
Department of the Navy
Type Executive Department
Jurisdiction U.S. Federal Government
Headquarters The Pentagon
Arlington County, Virginia, U.S.


Employees
747,809 (civilian)[1]
1,344,330 (active duty military)
778,096 (National Guard and reserve)
2,870,235 total (June 2022)
Annual budget US$721.5 billion (FY2020)[2]
Agency executives
Lloyd J. Austin, Secretary
Kathleen Hicks, Deputy Secretary
Mark A. Milley, Chairman of the Joint Chiefs of Staff[3]
Christopher W. Grady, Vice Chairman of the Joint Chiefs of Staff
Child agencies
Department of the Army
Department of the Navy
Department of the Air Force
National Security Agency
Defense Intelligence Agency
National Geospatial-Intelligence Agency
National Reconnaissance Office
Website www.defense.gov
United States
Armed Forces

Executive departments


Staff


Military departments



Military services






Command structure
Unified combatant commands
Combat support agencies
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The United States Department of Defense (DoD,[4] 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. The DoD is the largest employer in the world,[5] with over 1.34 million active-duty service members (soldiers, marines, sailors, airmen, and guardians) as of June 2022. The DoD also maintains over 778,000 National Guard and reservists, and over 747,000 civilians bringing the total to over 2.87 million employees.[6] Headquartered at the Pentagon in Arlington, Virginia, just outside Washington, D.C., the DoD's stated mission is to provide "the military forces needed to deter war and ensure our nation's security".[7][8]
https://en.wikipedia.org/wiki/United_States_Department_of_Defense
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