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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 ...
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.
Its main responsibilities are to control the Armed Forces of the United States. The department was established in 1947 and is currently divided into three major Departments—the Department of the Army , Navy and Air Force —and has a military staff of 1,418,542 (553,044 US Army ; 329,304 US Navy ; 202,786 US Marine Corps ; 333,408 US Air ...
Goldwater–Nichols Department of Defense Reorganization Act of 1986; Long title: To reorganize the Department of Defense and strengthen civilian authority in the Department of Defense, to improve the military advice provided to the President, the National Security Council, and the Secretary of Defense, to place clear responsibility on the commanders of the unified and specified combatant ...
United StatesArmed Forces. 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.
Website. defense.gov. 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 ...
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 under secretary of defense for intelligence and security or USD(I&S) is a high-ranking civilian position in the Office of the Secretary of Defense (OSD) within the U.S. Department of Defense (DoD) that acts as the principal civilian advisor and deputy to the secretary of defense (SecDef) and deputy secretary of defense (DepSecDef) on matters relating to military intelligence and security.