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

Special Forces officer tells Senate panel he was vilified as whistleblower

An Army Lieutenant Colonel told a Congressional panel that his security clearance was suspended and he came under a criminal investigation after being labeled a whistleblower.

White House orders federal agencies to tighten networks in 'cybersecurity sprint'

Federal CIO Tony Scott recently announced the 30-day cybersecurity sprint, which requires agencies to take several steps to beef up their security measures and improve the resilience of federal networks.

DOD, private-sector partnerships key to security, officials say

An employee exchange program between the Defense Department and commercial information technology companies is reaping benefits, a DOD official said. Through the Information Technology Exchange...

DoD floats proposal to bring 401k-style retirement plans to the military

The Defense Department submitted a proposal to Congress that would change the way the military handles its retirement benefits, says a June 10 DoD statement. The DoD took recommendations from a Compensation and Retirement Modernization Commission report released in January to create what the department calls a blended defined benefit and contribution system, according to the statement.

DoD makes the IT security gauntlet faster, less burdensome

A little more than a year ago, DoD implemented the Risk Management Framework for DoD Information Technology, or RMF for DoD IT. Defense officials expect it to be more flexible, more effective and provide a continuous view of security risks so they can be reviewed in a more timely manner.

DoD plans to save $15B by cutting back on service contracts

The Defense Department plans to save $15 billion by cutting back on service contracts, DoD Deputy Undersecretary for Acquisition Alan Estevez said at the Army's Institute of Land Warfare conference last week.

PSC says Cardin amendment arbitrarily cuts DoD contract spending

The Professional Services Council came out against a new amendment to the bill that sets out defense spending saying it would arbitrarily reduce contract spending. PSC says an amendment Sen. Ben Cardin (D-Md.) attached to the 2016 National Defense Authorization Act on June 4 would require the Defense Department to execute mandatory, arbitrary reductions in service contracts.

US, Japan partner on cyber defense

The Defense Department and Japanese Ministry of Defense share several viewpoints about cybersecurity, and that common ground has led the two to promise aid to each other in the event of an attack, according to a joint statement.

GAO: DoD has avoided cost and schedule overruns for programs in the testing phase

The Government Accountability Office lauded the Defense Department in a report Tuesday for its ability to avoid disputes that cause schedule and cost overruns for programs in the testing and evaluation phase.

DoD needs to beef up insider-threat protection, GAO says

The Defense Department's efforts to curb insider threats don't go far enough, a new report found.