Secretary of Defense James Mattis greets U.S. Marine Corps Gen. Joseph Dunford, Chairman of the Joint Chiefs of Staff, after arriving at the Pentagon in Washington, D.C., Jan. 21, 2017. (DOD photo by Air Force Tech. Sgt. Brigitte N. Brantley)
On New Year's Eve, a short phone call will mark the end of Defense Secretary Jim Mattis' tenure and the beginning of Patrick Shanahan's command of the Pentagon.
Defense Secretary Jim Mattis has resigned from his post — leaving many to freak out about what's to come in the defense world — but a message he personally delivered last year to troops under his command is worth heeding before he departs in February.