# Department of Defense (United States)

Published 2026-09-22. Last reviewed 2026-09-22. 0 sources.

The United States federal department that provides the country's military forces. Its headquarters building is the Pentagon, and it is headed by the secretary of defense.

## Sources

No sources are linked yet.

Source page: https://thewaronnews.com/glossary/us-department-of-defense. The War On News, CC BY 4.0.