As the others have stated, a definition of "victory" is required.
After all, Saddam Hussein has been removed from power, tried and hung for his crimes, and official hostilities with the government of Iraq are not
being undertaken. Given those circumstances I would say "victory" under a minor part of the initial premise for invasion has already happened.
If you mean "victory" as in the complete and utter surrender of all insurgents/resistance fighters/jihadists (pick your own term as you see fit)
then, to be honest, I think you are misguided as its not going to happen.
The lid has been opened on a hornets nest and only the Iraqi people, on their own, are going to be able to determine how their country moves forward.
No amount of intervention by the US will help - in fact it is quite the opposite, our presence there destabilizes the issues by adding an outside
element and adds to the cause of the fanatics. In that case "victory" is job done (Saddam gone) and home for the armed forces personnel.
You condemed my fellow candidates for giving you political answers, but you asked an open ended and undefined political question.

