Updated: Functions of the Department of Defense and Its Major Components
Department of Defense Directive 5100.01: Functions of the Department of Defense and Its Major Components has been reissued. This is the first major update to this Directive since 1987. DoDD 5100.01 establishes the functions of the Department of Defense and its major Components, supporting the core mission areas of the Armed Forces, which are broad DoD military operations and activities required to achieve the strategic objectives of the National Security Strategy, National Defense Strategy, and National Military Strategy.