Department of Defense - Sub-Departments
The Department of Defense is in charge of providing security for the United States. They provide the military force necessary to deter war and protect the nation from those who wish to challenge that security. Their official headquarters is located at the Pentagon. 
This page contains a list of sub-departments that are a part of the Department of Defense. This is an active list that is open to change, and it is meant to be a convenient public reference, not an official list. All the sub-departments listed below are referenced from this department's government website , where an official list may be accessed.
- 'DoD 101.' United States Department of Defense 06-07-2010 <http://www.defense.gov/pubs/dod101/>.