"In the Wildsnow Forest Mountain district of the 7th level of the Chaos Abyss, the demons and devils had a major battle. The only remaining Main God Devil Lord, the Lord of Tyranny, participated in this battle against Demon Main God Sophocles the Deceiver. The end result was that the devils achieved a major victory. Sophocles the Deceiver was seriously injured. However, the devils immediately retreated overnight, and gave up all their territory here."
Out of all the information I received, this one attracted my attention the most. Both sides had sent out Main Gods, so this was obviously an important strategic location.
The demons lost, but gained more territory. The devils won, but actually lost territory. While this may seem inconceivable, this would actually be quite normal for fights between devils and demons.