That presumes AOG, that this is in fact a 'war', and that a 'victory' is possible and can be envisaged and achieved.
I don't believe that either of those two factors are in place here.
Of course, George Bush coined the wonderfully hawkish, but meaningless phrase 'war on terror' - which has about as much practical meaning as a 'war on sunshine'.
The reality is - exactly as in Viet Nam - America presumed its superior military hardware and aggressive stance would win against a guerilla force living in, and supported by the native population.
As I mentioned earlier - all the Taliban has to do is wait out their time until America gets sick of plaiting fog and moves out, taking its auxilliary support (UN and British troops) with it, leaving things much as they were, apart from a deal of destruction, a lot of dead people, and an even greater hatred of the West than before.
If the politicos can wrangle that into something that agrees with their intent on 'victory', and the tragic / laughable 'get the job done', then that will be the end of it.
For now. Then the revenge starts ...