War in HEAVEN

Generally there is a belief that at some point in time Lucifer joined forces with a third of the divine host in an attempt to place themselves as rulers in the Kingdom of Heaven, by overthrowing God and the faithful angels.

Revelation 12:7-10 (KJV):
Michael the Archangel Defeats the Great Dragon

Revelation 12:7-10:
A supernatural battle occurs between the Angels of God and the Fallen Angels of Satan.

The Angels of God prevail:

7. And there was war in Heaven: Michael and his angels fought against the Dragon; and the Dragon fought and his angels,

8. And prevailed not; neither was their place found any more in Heaven.

9. And the Great Dragon was cast out, that Old Serpent, called the Devil, and Satan, which deceived the whole world: he was cast out into the Earth, and his angels were cast out with him.

10. And I heard a loud voice saying in Heaven, 'Now is come Salvation, and Strength, and the Kingdom of our God, and the Power of His Christ: for the Accuser of our Brethren is cast down, which accused them before our God Day and Night.'

http://www.steliart.com/angelology_fallen_heavens_war.html - FOR FURTHER STORY....