Blood War (second part)

Military action

Devils ally themselves with Angels and reconquer Underground.

Following the Blood War (first part) .
After being banished the Devils seek aid and encounter a Seraphim named Lucifer. Lucifer accepts to help devils and together they fight back against the Demons. After a long fight they manage to push the demons out of Underground and back into Abyss.   Following this war Lucifer remains in underground as its new ruler.    Blood War is often considered a legend rather than a true historical event.