As a joint force commander, Secretary Mattis commanded U.S. Joint Forces Command, NATO’s Supreme Allied Command for Transformation, and U.S. Central Command. At U.S. Central Command, he directed military operations of more than 200,000 soldiers, sailors, airmen, Coast Guardsmen, Marines and allied forces across the Middle East.
Following his retirement from the U.S. Marine Corps in 2013, Secretary Mattis served as the Davies Family Distinguished Visiting Fellow at the Hoover Institution at Stanford University, specializing in the study of leadership, national security, strategy, innovation, and the effective use of military force. In 2016, he co-edited the book, Warriors & Citizens: American Views of Our Military.