The Marine Corps has released a new video of retired Gen. James Mattis fielding questions from the likes of Sepia Allthethings, Philly Best, and Hey Del Bono on topics ranging from military leadership, to literature, to lessons learned during the Second Battle of Fallujah.

Silly aliases aside — “Where do you guys get these names?” Mad Dog asks, twice — the 16-minute video brims with hard-earned, unfiltered wisdom drawn from the general’s long and celebrated career, which lasted from 1969 to 2013.

“Nothing, nothing really can stop us,” says the former leader of U.S. Central Command. “We just don’t take refuge in self-pity or any of that kind of stuff. So, as a result, the Marine Corps remains a very feared organization in this world, as it should be.”