The Department of Defense (DoD) is the federal executive department responsible for coordinating and supervising all agencies and functions of the government relating to national security and the United States Armed Forces. Headquartered at the Pentagon, it oversees the Army, Navy, Air Force, Marine Corps, Space Force, and Coast Guard in wartime, managing global operations, strategic planning, and defense policy.

Defense Strategy and Oversight
The DoD shapes U.S. foreign policy alongside the National Security Council and State Department, focusing on nuclear deterrence by tracking nuclear threats, responding to them, and planning for nuclear scenarios. Congress provides oversight of the $1 trillion military budget, amid debates on whether it has lost control of wars.

Personnel and Support
Recruitment pathways include ROTC, service academies, and JROTC, with benefits like tuition assistance and TRICARE. Service members access mental health resources and chaplain services.

Procurement, Technology, and Modernization
Debates surround military spending and shipbuilding costs, with partnerships revitalizing industry. Innovations include cloud computing, hypersonics, drones, and JADC2 for digital warfare.

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Dive Deeper Into Department of Defense

Defense Health Agency

The Defense Health Agency (DHA) is the U.S. Department of Defense’s joint combat support agency…

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Defense Logistics Agency

The Defense Logistics Agency (DLA) is the United States Department of Defense's primary logistics combat…

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All Articles on Department of Defense

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…

Mental Health Resources for Military Families: A Support Guide

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Total Force Fitness: The Military’s Complete Guide to Peak Performance

When most Americans picture military fitness, they see pushups, long runs, and obstacle courses. That traditional view is outdated. Today's…

A Guide to Interservice Transfers: How to Switch Military Branches

For many service members, a military career is a journey of growth and change. Sometimes, that journey leads to a…

Professional Military Education: A Guide to PME Requirements by Rank

A military career is a journey of continuous growth in leadership and intellect. At the heart of this journey is…

Military Officer Promotion Boards: A Guide to Getting Selected

Every year, thousands of military officers face the ultimate career test: the promotion board. Behind closed doors, senior officers review…

How the Pentagon and VA Work Together to Support America’s Veterans

When a soldier takes off the uniform for the last time, two of America's largest government agencies must execute a…

How Army Soldiers Earn Their Stripes Through Promotion Points

Every month, thousands of Army soldiers check their phones or computers for the same thing: promotion cutoff scores. These numbers…