For John, BLUF: It is a joke. Nothing to see here; just move along.
WARNING WARNING WARNING
It is The Duffle Blog
This comes from a quote attributed to then Major General James Mattis, when he was commanding Marines in Iraq, as quoted in Fiasco: The American Military Adventure in Iraq, written by Tom Ricks.
Be polite, be professional, but have a plan to kill everybody you meet.
Hat tip to the InstaPundit.
Regards — Cliff