User blog comment:B214/Question and Answers 4/@comment-24098614-20141126101230/@comment-1359322-20141127002650

How is that the fault of the Lucifer that the Great War happened? Devils, Angels and Fallen Angels have been enemies since the start, unlike the current Devils, Angels and Fallen Angels which all suffered great loss and learned their lessons, the past Devils, Angels and Fallen Angels have large troops maybe even armies. They have nothing to worry about so they can just wage war easily even if their leaders refuse to fight, but in this case, God and the Four Satans led the War, and both died, thus ending the war.

In fact, you should thank the fact that the great war happened if it didn't happened, then we wouldn't reach the point where the plot of DxD can happen.