It was all sorts of things, howeve we had been buying off people for years and it only worked at the exact same time our strategy changed dramatically that it made a difference.
We don’t need to know for years. We made a significant change in strategy from seek and destroy to counter insurgency. That strategy was built on the fundamentals of clear, hold and build. Only those with no military understanding whatsoever still deny that the Petraeus strategy wasn’t at the center of the remarkable turn around.