I found this on the LA Times Blog.
A plan for staying alive
The (highly-unofficial) Marine Corps Rules for Gunfights are tacked to the wall at a Marine outpost in the Iraqi town of Anoh in the Euphrates River Valley. Among the rules:
1. Have a plan.
2. Have a backup plan because the first plan won't work.
3. The faster you finish the fight, the less shot you will get.
4. Be polite, be professional, but have a plan to kill everyone you meet.
— Tony Perry, in Anoh, Iraq