Revelation 11:7-9
And when they shall have finished their testimony, the beast that ascendeth out of the abyss, will make war against them, and overcome them, and kill them.
Revelation 12:3-4
And there appeared another sign in heaven, and behold, a great red dragon, having seven heads and ten horns; and upon his heads seven crowns.
Revelation 13:5-18
And there was given him a mouth speaking great and blasphemous things, and power was given him to make war forty two months.
Revelation 17:6
And I saw the woman drunk with the blood of the saints, and with the blood of the martyrs of Jesus: and when I saw her, I wondered with great amazement.
Revelation 17:14
These will make war with the Lamb, and the Lamb shall overcome them: for He is Lord of lords, and King of kings: and those that are with Him are called, and chosen, and faithful.
Revelation 19:19
And I saw the beast, and the kings of the earth, and their armies gathered together to make war with him that sitteth upon the horse, and against his army.