If you mean by 'military victory' an Iraqi government that can be established and whose writ runs across the whole country, that gets the civil war under control and sectarian violence under control in a time period that the political processes of the democracies will support, I don't believe that is possible.
A staggering admission. Bush's Mid-East laboratory for Jeffesonian Democracy is toast. Some of us knew that a while ago. Good to see even the hawks haven't completely abandoned sense.