...and decided to do what was necessary- as outlined in Petraeus's famous counterinsurgency field manual-
First, we need to draft and train about a half-million soldiers. In two previous wars we've had them on their way overseas within about a year.
Second, we need to rebuild the infrastructure of Iraq. Setting up honest authorities to oversee and perform the work shouldn't take more than several years.
Thus, if we really wanted to win, and started to do what we need to do to win, we could start working on the actual job within about a year and a half from now.
Of course, the Bush gang is getting exactly what they want from the war as it stands, so we won't do any of that...