James Mattis

Lawmakers want Mattis to submit a report to Congress on whether the U.S. military service have the equipment and training...

The remains of 55 U.S. troops missing from the Korean War will be sent back to Hawaii next week.

The defense secretary lauds America's relationship with its allies as he accepted an award Wednesday night.

Mattis said the U.S. commitment to NATO and members' pledges to mutual defense are "exactly as the president described it.

Three U.S. senators argue that sending JAGs to the Mexican border would add strain to an overloaded justice system.

The Pentagon gets about 13 billion questionable emails each year, which are scanned and dumped before reaching an inbox.

Defense Secretary Jim Mattis announced Friday that he was suspending all major military exercises with the South Koreans.

"Holding these people while they await immigration proceedings would transform military bases into incarceration camps."

U.S. Pacific Command will be called U.S. Indo-Pacific Command moving forward, Defense Secretary Jim Mattis said.