Six life lessons from the 'Warrior Monk' - Trump's man on defence James Mattis
US President-elect Donald Trump has named his defence secretary - and it's an early Christmas present for the internet.
General James Mattis is nicknamed Mad Dog. Or the Warrior Monk.
He's a former marine who served in Iraq and Afghanistan.
Donald Trump says: "He's our best." But forget his military prowess - this guy has a knack with some seriously inspiring quotes.
The 66-year-old is known for his #Mattisisms.
1) 'Be polite, be professional, but have a plan to kill everybody you meet.'
This tip might seem excessive to most normal people.
But to be fair, he was talking to a group of Marines in Iraq in 2003.
The Warrior Monk never married or had kids.
He rose up through the ranks before retiring in 2013.
He fell out with President Obama's administration, especially over Iran.
He thinks it's the "single most enduring threat to stability and peace in the Middle East".
2) 'It's fun to shoot some people.'
It's fair to say he seems to have really enjoyed certain parts of his career.
Mostly, the bits involving bullets.
He once admitted: "I'll be right upfront with you, I like brawling."
This is what he had to say about Afghanistan in 2005: "It's a hell of a hoot. It's fun to shoot some people."
To be fair, there's a bit more context.
He said: "You go into Afghanistan, you got guys who slap women around for five years because they didn't wear a veil.
"You know, guys like that ain't got no manhood left anyway.
"So it's a hell of a lot of fun to shoot them."
3) 'There are some assholes in the world that just need to be shot.'
He once spoke about the psychological impact on soldiers when they kill.
"The first time you blow someone away is not an insignificant event.
"That said, there are some assholes in the world that just need to be shot."
He also said that it's not personal.
"There are some people who think you have to hate them in order to shoot them.
"I don't think you do. It's just business."
4) 'I come in peace. I didn't bring artillery.'
When he met tribal leaders in Iraq, it started off quite nicely.
"I come in peace. I didn't bring artillery."
Then it all got a bit dark though.
He continued: "I'm pleading with you, with tears in my eyes: If you **** with me, I'll kill you all."
5) 'You will decide if you are a hunter or a victim.'
Another gem from General Mattis: "There are hunters and there are victims.
"By your discipline, cunning, obedience and alertness, you will decide if you are a hunter or a victim.
"It's really a hell of a lot of fun. You're gonna have a blast!"
6) 'The most important six inches...'
If this all sounds wildly gung-ho - well, it is.
But there's more to Mad Dog than his love of shooting and a nice turn of phrase.
He's also known as an intellectual, with a personal library of more than 7,000 books.
He gave troops reading lists and made sure they understood some of the culture in the areas where they were fighting.
He encouraged them to grow moustaches so they would look more like the people they were working with.
He said: "The most important six inches on the battlefield is between your ears."
And he advised Marines: "Engage your brain before you engage your weapon."
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