Why not? We outsourced the invasion of Ashcanistan and that worked pretty well.
The whole point of this article is that the invasion can go well whether we use irregular indigents (Afghanistan) or infantry divisions of the U.S. armed forces (Iraq).
BUT
We are facing a rise in attacks from the Taliban in Afghanistan (with Canada and Australia now sending more troops to help counter it)
AND we face continuing attacks on our forces in Iraq.
Thinking the Islamic radicals in Afghanistan and Iraq are going to go away is like thinking the fascist liberals in the U.S. are going to go away.
I believe we are in for a long haul on both fronts.