"The rules of jus in bello (or justice in war) serve as guidelines for fighting well once war has begun. Some maintain that morality does not exist in warfare, and therefore object to just war theory. War is hell, the argument goes, and one is entitled to do whatever is necessary to ensure victory for one's own side. Just war theory, on the other hand, sets forth a moral framework for warfare and rejects the notion that "anything goes" during times of war."
Anyone care to speculate in the comments whether (and how) this may come into play in the last new episode of SPN we're going to get? Since they made it the title and all.