en.wikipedia.org/wiki/United_States_Department_of_Defense

The Department of Defense is an executive branch department of the federal government charged with coordinating and supervising all agencies and functions of the government concerned directly with national security and the .... and is the foundational issuance for delineating the major functions of the department.

govinfo.library.unt.edu/npr/library/status/mission/mdod.htm

The Department of Defense is responsible for providing the military forces needed ... The major elements of these forces are the Army, Navy, Marine Corps, and Air ... advisers to the Secretary and perform such functions as he assigns to them.

www.performance.gov/defense

The Department of Defense's enduring mission is to provide combat-credible military ... This has never been more important as the United States confronts a more .... Departments or headquarters function when it is more effective, economical, ...

archive.defense.gov/about

The Department of Defense is America's oldest and largest government agency. ... Those resources have never been more important as America fights terrorists ... information about defense policies, organizations, functions and operations.

fas.org/nuke/guide/usa/doctrine/dod/5100-52m/chap2.pdf

DoD response policy recognizes the response roles of nuclear weapon owners or ... Commanders of Unified Commands shall have primary responsibility for ...

www.defense.gov/Our-Story

The Department of Defense provides the military forces needed to deter war and ensure our nation's ... Reform the department. ... Performing the Duties of

www.thebalance.com/department-of-defense-what-it-does-and-its-impact-3305982

Mar 21, 2019 ... The DoD's Function. The U.S. Department of Defense provides the military power needed to protect the United States. It maintains 561,975 ...

classroom.synonym.com/what-are-the-responsibilities-of-the-department-of-defense-12080735.html

Oct 4, 2017 ... The United States Department Defense is tasked with the responsibility of ... In her spare time, Leigh puts her English major to use by tutoring in ...

system.uslegal.com/government-departments/department-of-defense

The Department of Defense (DoD) is responsible for providing the military forces ... The major elements of these forces are the Army, Navy, Air Force, and ... under its own Secretary and functions under the authority, direction, and control of the ...