An untrained or uneducated Marine ... deployed to the combat zone is a bigger threat to mission accomplishment ... than the enemy.

Be polite, be professional, but have a plan to kill everyone you meet.

Right now, Russia's future should be wedded to Europe. Why they see NATO as a threat is beyond me. Clearly, NATO is not a threat.

You've been told that you're broken. That you're damaged goods ... there is also Post-Traumatic Growth. You come back from war stronger and more sure of who you are.

I would consider the principal threats to start with Russia. And it would certainly include any nations that are looking to intimidate nations around their periphery, regional nations nearby them, whether it be with weapons of mass destruction or I would call it unusual, unorthodox means of intimidating them.

What concerned me was that [James Mattis] played not only a critical role as a battlefield commander in Fallujah, but also, afterwards, when he was promoted to various other higher-ranking positions, he served as a convening authority in court-martial proceedings against various marines who had been accused of atrocities - for example, in the Haditha massacre, where a group of marines went on a killing spree after one in their unit was killed.

There is nothing better than getting shot at and missed. It's really great.