This link takes you to a plain English explanation of the Law of Armed Conflict. If you have any interest in the war in Iraq whatsoever, I'd highly recommend you read it.
Link
To all those who believe the personnel at Abu Ghraib should be found innocent because they were "just following orders", please take note:
SECTION VII- Consequences
We all have an individual duty to know the law of armed conflict and to follow the rules. This includes reporting suspected violations. If we do not report them, we can be subject to trial by an international court or we can be prosecuted by the military.
You must also follow lawful orders. However, an order to commit a criminal act, such as a violation of the law of armed conflict, is illegal...you must not follow it. You can presume an order to perform a military duty is legal, but following an order that an ordinary person would know to be illegal, isn't excusable. For instance, an order to shoot all unarmed civilians or to kill a POW would be illegal. Obeying it would be a violation.
What should you do if you think you've been given an illegal order? First, ask for clarification. Maybe the order was unclear, or you didn't understand it. If you still think the order is illegal, try to get it withdrawn. If that doesn't work, you must disobey it. If others obey the order, you have the duty to report that violation of the law of armed conflict.
Any questions?