Damn Dirty Ape said:
There are no rules in war, if there would be you'd help the other guy up after you shot/stabbed him and say gg. War brings out the worst in people, the means often don't justify the end. I often hear people bring up the geneva convention, do you honestly think laws will do you much good if some tormented officer holds a gun to your head in the middle of nowhere? The media is biased which is only human, no human writing can be purely objective especially when the topic is something like war.
There are good people in war, most likely the ones that don't execute you on the spot. That's more a matter of a persons heart instead of that from a "rules" perspective. In the end human instinct is to survive, in order to survive you need to be more powerfull. In the end no law can hold a person back and he/she will kill in order to survive. If there should be rules I'd rather have one forbidding war in general, isn't that alot more logical?
There are actually myriad rules or laws of warfare, ranging from customary rules of war which are vague and require interpretation, to formal treaties such as the Hague and Geneva Conventions. These come about primarily because the various nations' militaries realize that the politicians or rulers of their respective countries may start a war. Of course not all these laws are followed all the time; even at the best of times (i.e. when no one is actively trying to kill you) not all laws are followed all the time. But there is a bond between fighting men and women that goes beyond national boundaries and interests. Further, there is an enlightened self interest among soldiers that says certain rules will protect us if captured and make it easier to return to peacetime civilian life afterwards.
These laws and principles are drilled into soldiers precisely because they often run contrary to natural self-interest. If I am manning a checkpoint in Fallujah and a car is speeding towards me, my natural inclination is to kill it at the maximum possible distance. Rules of engagement are there specifically to override this natural human inclination for personal safety, to make some allowance for the possibility that the car might be driven by a man rushing his pregnant wife to the hospital, or an old man who has panicked - or a suicide bomber. Rules of engagement are drafted according to the situation, taking into account the formalized laws of warfare. Soldiers take enormous personal risk to minimmize civilian casualties.
Other laws of warfare are simply ratified agreements between signatory nations. An example of this is the prohibition against exploding or expanding bullets. Each side (well before any conflict) agrees that whomever I am fighting, I will not use bullets designed to cause unnecessary pain or damage. I may shoot you, but it's nothing personal, dude. Captured soldiers in uniform are not to be executed, but are to be provided with safe quarters and reasonable food (to the same standard as is available to their captors) and removed from the battleground as quickly as is practical. These laws emphasize that the struggle is for a nation's interests rather than just a bunch of hate breaking out. There should always be things you are not willing to do, even for your nation's interests. Laws of warfare attempt to define those at a common level for all signatory nations. And that's a good thing.