Here are three quotes from Mattis:
“Be polite, be professional, but have a plan to kill everybody you meet.”
“I come in peace. I didn’t bring artillery. But I’m pleading with you, with tears in my eyes: If you fuck with me, I’ll kill you all.”
“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.”
Good luck, world!