This story was told by Dr. Albert C. Pierce, the Director of the Center for the Study of Professional Military Ethics at The United States Naval Academy:
A couple of months ago, when I told General Krulak, the former Commandant of the Marine Corps, that we were having General Mattis speak that evening, he said, “Let me tell you a Jim Mattis story.”
General Krulak said, when he was Commandant of the Marine Corps, every year, starting about a week before Christmas, he and his wife would bake hundreds and hundreds and hundreds of Christmas cookies. They would package them in small bundles.
Then on Christmas day, he would load his vehicle. At about 4 a.m., General Krulak would drive himself to every Marine guard post in the Washington-Annapolis-Baltimore area and deliver a small package of Christmas cookies to whatever Marines were pulling guard duty that day. He said that one year, he had gone down to Quantico as one of his stops to deliver Christmas cookies to the Marines on guard duty. He went to the command center and gave a package to the lance corporal who was on duty.
He asked, “Who’s the officer of the day?” The lance corporal said, “Sir, it’s Brigadier General Mattis.”
And General Krulak said, “No, no, no. I know who General Mattis is. I mean, who’s the officer of the day today, Christmas day?”
The lance corporal, feeling a little anxious, said, “Sir, it is Brigadier General Mattis.”
General Krulak said that, about that time, he spotted in the back room a cot, or a daybed. He said, “No, Lance Corporal. Who slept in that bed last night?”
The lance corporal said, “Sir, it was Brigadier General Mattis.”
About that time, General Krulak said that General Mattis came in, in a duty uniform, and General Krulak said, “Jim, what are you doing here on Christmas day? Why do you have duty?” General Mattis told him that the young officer who was scheduled to have duty on Christmas day had a family, and General Mattis decided it was better for the young officer to spend Christmas Day with his family, and so he chose to have duty on Christmas Day.
General Krulak said, “That’s the kind of officer that Jim Mattis is.”