Re: Confusion as usual
Please don't think that I am condoning what is being done, but the problem is that it is not actually possible to declare war on an organisation that has no recognition in International Law.
It is possible to declare war on a country or nation (see here for a definition), but neither the Taliban, nor ISIS (despite their self-styling) are either countries or nations. This means that there cannot be an official declaration of war against them.
If there is no war, the people fighting cannot be classed as legal combatants, nor once captured, can they be described as "prisoners of war". This is the reason why the "enemy combatant" was used. It's dodgy as hell and designed to be ambiguous, but once the US had decided they needed to hold these people, what else could they do other than define a new category of prisoner.
In addition, the establishment of the United Nations was meant to prevent declarations being made without international debate, but again, Taliban and ISIS are not nations, so the UN is hamstrung and impotent. If the Asad regime was in good stead with the international community, and invited help, things would be different, but taken respectively, they're not, and won't.
We're in a whole new and undefined area of conflict that is not adequately reflected in International Law. IMHO, the UN Charter needs serious revision to recognise extra-national organisations so that the position can be clarified.