...legal dopers, what is a "unprivileged combatant", and...

…how long has the term been in use?
Some of the detainees are being charged with “attempted murder by a unprivileged combatant” or “murder by a unprivileged combatant.” and while I get the impression from a google search that it is another name for an "illegal combatant, would like to find the legal definition if possible.

Some uses of the term:

http://www.foreignminister.gov.au/transcripts/2005/050801_ds.html
http://news.yahoo.com/s/oneworld/20060108/wl_oneworld/45361252381136698011

From the Air Force Law Review:

(Emphasis added.)

http://www.findarticles.com/p/articles/mi_m6007/is_55/ai_n8585592/pg_2

From the Wikipedia – http://en.wikipedia.org/wiki/Unlawful_combatant:

The quotes provided by other Dopers give an accurate answer, but it should be known that the term is an attempt to get around the Geneva Conventions and other related elements of international and domestic law eg the Hague Convention.

The Conventions give certain rights to members of the armed forces / militias (GC III) and to civilians (GC IV). By titling these detainees “unlawful combatants” or something similar, the Bush administration and its allies attempt to create a class of detainees that is neither military or civilian, and thus not entitled to the rights of either class.

What I really think about this would take this thread to GD or the Pit, but that’s the general gist.

That should be Hague Conventions. My statement that the terms are “attempts to get around the GCs” is opinion, not fact, so I withdraw it. Instead, I state that some have argued this, and that many believe that they have had such an effect.

…thanks to all. Can we confirm that it is a recent term, or does it have “history?”

Right. It has been pointed out that the commentary to the Fourth Geneva Convention on the Protection of Civilian Persons in Time of War says:

BRIEF OF AMICI CURIAE EXPERTS ON THE LAW OF WAR in *Padilla v. Rumsfeld * (2d Cir. 2003).

But see, Fourth Convention, Article 5:

Joseph P. Bialke, “Al-Qaeda & Taliban unlawful combatant detainees, unlawful belligerency, and the international laws of armed conflict,” Air Force Law Review, Spring, 2004: http://www.findarticles.com/p/articles/mi_m6007/is_55/ai_n8585592/pg_18 *quoting * Knut Dormann, The Legal Situation of “Unlawful/Unprivileged Combatants,” 85 I.R.R.C. 45, 46 (Mar., 2003) (citing several references for similar claims).

The term and the concept of an “unlawful combatant” have some history to them, at least in U.S. law. The term “enemy combatant” was first used in a wartime case dealing with some Nazi sabotuers, Ex Parte Quirin, 317 U.S. 1 (1942). The Court there further drew a distinction between lawful combatants and unlawful combatants.