As a Marine, that was my job.
And I ain’t laughing.
Flat Ass Rules - Unity of Command; Geometry of Fires; Guardian Angel.
Be polite. Be professional. But, Have a plan to kill everyone you meet. Be curteous to everyone and friendly to no one.
There is no better friend and no worse enemy than a US Marine.
Marine General James Mattis
Good men sleep peacefully in their beds at night because rough men stand ready to do violence on their behalf -George Orwell