I think thats one of the things I like most about the WH40K universe that I know of. It has to be one of the grimmest and most...well realistic view of war that I can think of.
"He was the best of us. They struck without provocation, there was no reason. Animals! Brutal! They deserve no mercy! Strike them down, follow them back to their base and kill all of them, all of them! No mercy!" - Delenn