The Son casts the rebels out of Heaven. 1866 Illustration by Gustave Doré for John Milton's Paradise Lost.
The Fall of the Rebel Angels; left hand panel of Hieronymus Bosch's The Haywain Triptych, c.1500

The War in Heaven is a mythic conflict between supernatural forces in traditional Christian cosmology, attested in the Book of Revelation alongside proposed parallels in the Hebrew Bible and the Dead Sea Scrolls. It is described as the result of Satan, who is often identified as the angel Lucifer, rebelling against God and leading to a war between his followers and those still loyal to God, led by the Archangel Michael.[1][2] Within the New Testament, the War in Heaven provides basis for the concept of the fallen angels and for Satan's banishment to Hell. The War is frequently featured in works of Christian art, such as John Milton's epic poem Paradise Lost, which describes it as occurring over the course of three days as a result of God the Father announcing Jesus Christ as his Son.

Revelation 12:7–10

The War in Heaven is attested to only in the Book of Revelation: