I'm wondering why the OP would call a war unwinnable, when his example is that the Taliban brilliantly executed an ambush on unarmed civilians. Wow, how impressive. Amazulu, you and I could have pulled that off. As to whether the war in Afghanistan is unwinnable, it is unwinnable to the extent that as in Vietnam, our war aims and strategy aren't clear. We need some leadership in that regard to establish achievable war aims, and a strategy for achieving said aims.