At the end of the battle for Fallujah, a convoy of around 500 vehicles allowed Isis fighters to flee the city to Syria.
The Pentagon refused to bomb the convoy because the vehicles belonged to civilians and they were probably transporting the wives and children of some jihadists.
However, the Iraqi army decided to bomb it, destroying more than 200 vehicles and killing their occupants.
Iraqi soldiers are convinced that the Pentagon had received instruction to let the CIA advisers, that were training the jihadists, escape.
http://www.voltairenet.org/article192703.html, July 10, 2016