More On Department of Defense - DoD

Shanahan also announced that Pentagon Comptroller David Norquist would take on his former duties as Deputy Defense Secretary.

At a Cabinet meeting, Trump said he "essentially" fired Mattis by ordering him out of the Pentagon by Jan. 1.

The public quarrel between a retired Army four-star and the president has heated up.

New Acting Defense Secretary Patrick Shanahan pledged loyalty to President Donald Trump and no pushback on policy.

The new Pentagon chief spokesman, Charlie Summers, is a former Maine politician and Navy reserve captain.

Defense Secretary Jim Mattis' farewell to the troops was pointed and brief.

The Pentagon identified the two U.S. Army soldiers and one Air Force airman who were killed in a blast in Afghanistan.

In his farewell, Mattis quoted a telegram from President Abraham Lincoln to Gen. Ulysses S. Grant.

The handoff will take place during a phone call, a defense official said.

Attorney says the justices' unique request signals interest in a military medical malpractice case.