"And there was war in heaven. Michael and his angels fought against the
dragon, and the dragon and his angels fought back." (Rev. 12:7).
Revelation 12:4
And his tail drew the third part of the stars of heaven, and did cast them
to the earth: and the dragon stood before the
woman which was ready to be delivered, for to devour her child as soon
as it was born.
Revelation 12:13
And when the dragon saw that he was cast unto the earth, he
persecuted the woman which brought forth the man child.
Revelation 12:17
And the dragon was wroth with the woman, and went to make war with
the remnant of her seed, which keep the commandments of God, and have the
testimony of Jesus Christ.
Revelation 19:19
And I saw the beast, and the kings of the earth, and their armies,
gathered together to make war against him that
sat on the horse, and against his army.
Isaiah 27:1
In that day, the LORD will punish with his sword, his fierce, great and
powerful sword, Leviathan the gliding serpent,
Leviathan the coiling serpent; he will slay the monster of the sea.