Bing found the following results
United States Department of Defense - Wikipedia
Organizational structure of the United States Department of Defense ...
About - U.S. Department of Defense
List of U.S. Department of Defense agencies - Wikipedia
U.S. Department of Defense (DoD) | Britannica
The History of the Department of Defense
United States Secretary of Defense - Wikipedia
U.S. Department of Defense
Biography - U.S. Department of Defense
United States Department of State - Wikipedia