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Department of Defense

The Department of Defense is the federal agency responsible for the military and for national defense. It oversees the armed services, defense intelligence, military research, and the health care, supply, and personnel systems that support troops and their families. A civilian secretary of defense answers to the president, and Congress funds and oversees the department.

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Sep 30last updated

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Latest in Department of Defense

Topics in Department of Defense

Research, health, and supply

The Defense Advanced Research Projects Agency funds breakthrough research, the Defense Health Agency runs the military health system, and the Defense Logistics Agency supplies the forces with goods and equipment.

All Articles on Department of Defense

Should the Department of Defense Become the Department of War Again?

Former President Donald Trump and Defense Secretary Pete Hegseth have proposed renaming the Department of Defense back to its historical predecessor: the Department of…

38 Min Read

How America Tracks Nuclear Threats

Nuclear threat evaluation isn't a single task handled by one agency. It's a massive, ongoing operation that involves dozens of government departments, national laboratories,…

37 Min Read

How America Responds to Nuclear Threats

America's nuclear response system operates around the clock, combining policy, technology, alliances, and public preparedness to prevent nuclear conflict. The system's primary goal is…

25 Min Read

How America Plans for Nuclear War

The United States maintains one of the world's most complex nuclear planning systems. It spans everything from high-level strategy documents to detailed emergency instructions…

43 Min Read

Debating American Military Spending: Amount, Priorities

America spends more on its military than the next nine countries combined. That's nearly two-fifths of the world's total defense spending. Yet as a…

85 Min Read

How War Powers Have Shifted from Congress to the Presidency

An Authorization for the Use of Military Force sounds like bureaucratic paperwork. But these little-known congressional resolutions have become the legal foundation for America's…

34 Min Read

America’s Draft: What Every Young Man Needs to Know

The United States hasn't drafted anyone since 1973, but the machinery remains ready. Nearly all American men between 18 and 25 must register with…

22 Min Read

A Guide to Religious Accommodation in the U.S. Military

The United States military places a high value on the right of its service members to observe the tenets of their respective religions, or…

39 Min Read

Pentagon Partnerships: How the Military Works with Private Companies

The Pentagon buys weapons and equipment from private companies but it also partners with them in ways most Americans never see. These collaborations shape…

32 Min Read

Faith Under Fire: How Military Chaplains Serve America’s Warriors

When Army Chaplain Matthew Boyd baptized soldiers in a makeshift pool filled with water from a fuel bladder in the middle of Iraq, he…

33 Min Read