Pershing would do things like hang pigs above the open graves of Muslim terrorists, then slice open the necks and guts of the pigs, and let the blood and entrails fall into the graves of these Muslim terrorists. He would then bury the pig with them.
The messages is that these terrorists will go straight to hell because Allah will not accept men tainted with the blood of this unclean animal.
It stopped the Muslim "Jihad" dead in it's tracks.
He did none of those things.
In fact, his tactics generally led to surrender without the loss of life.