The Department of Defenseoversees the U.S. Army, Navy, Marine Corps,
and Air Force. It is headquartered at the Pentagon.
Colonel Peter T. Underwood, U.S. Marine Corps (Ret.), holds a BA from the Virginia Military Institute, an MA in history from Duke University, an MA in national security and strategic studies from the Naval War College, and is also a graduate of the Air Command and Staff College and the Armed Forces Staff College. His career has included multiple assignments in the Far East and Europe, and he is a veteran of Operations Desert Shield/Desert Storm, Desert Fox, and Southern Watch. His staff assignments have been at the battalion, regimental, air group, division, component command, and unified command levels. He has also served as a history instructor at the U.S. Naval Academy and as Professor of Strategy at the U.S. Naval War College. He currently works as an independent consultant.