The Department of Defense (DoD) is a department of the federal government and has three main components: The departments of the Army, Navy, and Air Force. The DoD is housed in the Pentagon building. The department's roles and limits are contained in Title 10 of the US Code. This section of the law has five components: Subtitle A refers to General Military Law, Subtitle B to the Army, Subtitle C to the Navy and the Marine Corps, Subtitle D to the Air Force and Subtitle E to Military Reserves. Important agencies within the DoD include the Defense Information Systems Agency (DISA), National Security Agency (NSA), the Missile Defense Agency, and the Defense Intelligence Agency (DIA). The DoD receives the largest portion of each year's federal discretionary spending budget. 

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Latest Headlines

GAO: State Department counterterrorism program in Africa needs strengthening

A State Department regional bureau, which manages a $104 million U.S. counterterrorism program in East Africa, lacks sufficient financial and operational data to determine whether plans and goals are being met, congressional investigators said.

DoD EHR 'substantially' defined in latest draft RFP

After several draft versions, a request for proposal for the Defense Department's highly-anticipated electronic health record is taking shape. Draft solicitations for the DoD's Healthcare Management System Modernization, or DHMSM, have been updated several times since DoD  issued its first acquisition draft document  in January.

GAO: DoD's $1B cost savings estimate from 2013 civilian furloughs not that accurate

Although the Department of Defense said it saved about $1 billion from furloughing civilian workers to meet sequestration last year, congressional investigators said the estimate was not as accurate as it could have been.

Kendall: Superior Supplier Incentive Program extending to Air Force and Army

The Navy Department's Superior Supplier Incentive Program, a pilot program launched as part of the Defense Department's Better Buying Power initiative, will be adopted broadly across the department, said a top DoD official.

DHA rarely overturns Tricare appeal ruling

The Defense Department's Tricare appeals decisions are overturned by the Defense Health Agency only 15 percent of the time, a June 4 DoD report to Congress says. Out of 124 cases that were appealed and finalized between fiscal 2009 and fiscal 2013, the DHA ruled to fully support the appeal in 106 cases, the report (pdf) says.

Expert panel: DoD needs to revamp process to keep pace with IT products and services

The Department of Defense needs to revamp the way it buys IT products and services, including changing rigid federal regulations, being open to more commercial competition and providing more training to the agency's acquisition workforce, to keep pace with rapid technological changes, an expert panel at the Brookings Institution said recently.

IT and program management grow closer at DoD

The Defense Department's chief information officer and deputy chief management officer will be sharing an even closer relationship as they try to tie technology and management together. Terry Halvorsen, DoD's acting CIO, said he and DCMO David Tillotson are going to be seamless in their approach.

DHS making 'great strides' in better managing IT programs and retaining workforce, CIO testifies

The Department of Homeland Security has made major advancements in managing its IT programs and attracting and retaining its workforce, the agency's chief information officer said during a recent Senate hearing.

Flood of unaccompanied minors across southwestern border forces vast federal response

The massive number of unaccompanied children crossing the southwestern border has federal officials scrambling to provide enough people and space to deal with the crisis.

Report: Risks from climate change accelerating, national security affected

Impacts from climate change will not only affect local communities, but could also harm U.S. military readiness, a group of high-ranking retired military officers concluded in a recent study.