As news of the incident in Haditha filters out, it is becoming increasingly clear that Martin Van Creveld's paradox of modern warfare is in play:
In other words, he who fights against the weak - and the rag-tag Iraqi militias are very weak indeed - and loses, loses. He who fights against the weak and wins also loses. To kill an opponent who is much weaker than yourself is unnecessary and therefore cruel; to let that opponent kill you is unnecessary and therefore foolish. As Vietnam and countless other cases prove, no armed force, however rich, however powerful, however advanced, however well motivated is immune to this dilemma. The end result is always disintegration and defeat...