The "law-of-war"

A Slate article I want to recommend is entitled "Lincoln's Laws of War: How he built the code that Bush attempted to destroy". Here are a couple of paragraphs:

One of Abraham Lincoln's little-noted accomplishments has become his most unlikely legacy. He helped create the modern international rules that protect civilians, prevent torture, and limit the horrors of combat, the body of law known as the laws of war. Indeed, he was probably our most important law-of-war president, having crafted the very rules that George W. Bush and his Justice Department tried to destroy.
...
The code reduced the international laws of war into a simple pamphlet for wide distribution to the amateur soldiers of the Union army. It prohibited torture, poisons, wanton destruction, and cruelty. It protected prisoners and forbade assassinations. It announced a sharp distinction between soldiers and noncombatants. And it forbade attacks motivated by revenge and the infliction of suffering for its own sake. Most significantly, the code sought to protect channels of communication between warring armies. And it elevated the truce flag to a level of sacred honor.

Go read the rest of it. It's very illuminating.