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DoD Seal. This is a partial list of agencies under the United States Department of Defense (DoD) which was formerly and shortly known as the National Military Establishment. Its main responsibilities are to control the Armed Forces of the United States. It is headed by the Secretary of Defense.
Article II Section 2 of the Constitution designates the President as "Commander in Chief" of the Army, Navy and state militias. [2] The President exercises this supreme command authority through the civilian Secretary of Defense, who by federal law is the head of the department, has authority direction, and control over the Department of Defense, and is the principal assistant to the President ...
The National Aeronautics and Space Administration (NASA) is the federal government's space agency. It is responsible for the civilian space program as well as aeronautics and aerospace research. The National Archives and Records Administration (NARA) preserves the nation's history by overseeing the management of all federal records. The ...
It is part of the NASA Small Explorers program (SMEX) which designs low-cost spacecraft to study heliophysics and astrophysics. [112] The Neil Gehrels Swift Observatory was launched in November 2004 and is a gamma-ray burst observatory that also monitors the afterglow in X-ray, and UV/Visible light at the location of a burst. [113]
Secretary of Defense Donald H. Rumsfeld with Chairman of the Joint Chiefs of Staff General George S. Brown.While the Chairman of the Joint Chiefs of Staff acts as the highest-ranking and most senior military officer in the United States Armed Forces, the civilian Secretary of Defense acts as the highest-ranking and most senior position within the Department of Defense.
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.
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.
The Department of Defense delivers the military space programs. In 2019, the U.S. Space Force started as the primary DoD agent for delivery of military space capability. [1] Systems such as the Global Positioning System, which is ubiquitous to users worldwide, was developed and is maintained by the DoD. [2]