Bad mistake. That will leave too few of them left to withstand serious attacks by the Muslims,and you KNOW each Islamic "commander" wants to be the one known for "killing all the American soldiers in Afghanistan.
I say "Pull them ALL out NOW!" It seems obvious we,as a nation,have no intention or lack the willinngness to want to beat them,so get the hell out NOW!
And learn a lesson from this. NEVER get invovled in any wars in the future you don't intend to win!