- He was dubbed 'Mad Dog' by troops under his command.
- Graduated with a Bachelor of Arts in history from Central Washington University in 1971, and a Master of Arts in international security affairs from the National War College in 1994.
- Retired Marine Corps general who served as a Commander of United States Central Command from August 2010 to March 2013.
- U.S. Secretary of Defense under President Trump (January 2017 - December 2018).
- Studies military history and world history for personal interest.
- Merited a place in TIME magazine's "The 100 Most Influential People" issue with an homage penned by former CIA director and Secretary of Defense Robert Gates. (May 2017)
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