The former SecDef published a piece in Foreign Affairs on Monday warning against abrupt departure from Afghanistan.
The Marine Corps is also adding a new podcast to the list, which will come out at least every two weeks.
Mattis gave a moving and pointed tribute to the legacy of singer, songwriter and former enlisted sailor Bill Withers.
President Donald Trump said on "Fox & Friends" Tuesday that he wanted to "take out" Syrian President Bashar al-Assad.
The account comes from CNN's review of Bob Woodward's upcoming book, "Rage."
Retired four-star Gen. John Allen joined the chorus of former military leaders going after the president.
Mattis charged that President Donald Trump has failed in his duties to the Constitution and the American people.
Defense Secretary Jim Mattis addressed the peace talks Friday at the Pentagon.
Operations in eastern Syria have been scaled back after U.S. fighter jets fired on hundreds of alleged Russian mercenaries.
New soldiers at Fort Sill were the first to graduate Army Basic Combat Training wearing the service's new Army Greens.
Air Force 1st Lt. Kenneth "Kage" Allen was killed.
Soldiers offered feedback on the Army's futuristic new IVAS technology.
The Defense Department is predicting flat or declining budgets in future years.
Preparations are underway across the Departments of Defense and Veterans Affairs to receive doses of a COVID-19 vaccine.