Pete Hegseth told Milley, a critic of Trump, that he had ordered an investigation to determine whether his rank should be re-evaluated.

The Pentagon’s inspector general will review the conduct of the former chair of the Joint Chiefs of Staff, who has been a vocal critic of the president.

The Pentagon has asked its inspector general to review the record and behavior of Gen. Mark A. Milley, the retired chairman of the Joint Chiefs of Staff who stood up to President Trump in his first term.