Toecutter,
That article you are looking for was entitled "On Sheep, Wolves and Sheepdogs", and is an excerpt from a book, "On Killing" by LTC(Ret) Dave Grossman, RANGER, Ph.D.

I have a copy of the article... if you PM me with e-mail, I will send. You're right...it's very good.
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Ever forward and upward!

-Matt