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Mattis becomes Trump's first defense secretary

Reporting and findings

  1. documented

    After Donald Trump selected James Mattis for secretary of defense, Mattis began serving on January 20, 2017.

Summary and current status

Defense Department history records Mattis's service beginning January 20, 2017, after Trump selected him.

Served as defense secretary from January 2017 through December 2018

People and organizations

Relationships in this file

  1. Donald J. Trumpdefense secretary in Trump's first administrationJames Mattis