Revelation 11:7-9
And when they have completed their testimony, the beast that comes up from the pit [See 13:1ff; 17:3,7] will wage war against them, and overpower and kill them.
Revelation 12:3-4
And another [supernatural] sign was seen in heaven; it was a huge red dragon with seven heads and ten horns, and on each of his seven heads was a crown.
Revelation 13:5-18
And the beast was given [by the dragon ?] a mouth for making proud claims and [speaking] blasphemous words, and the authority to act for forty-two months [See 11:2; 12:6].
Revelation 17:6
And I saw that the woman was drunk on the blood of God's holy people and on the blood of those [who were killed] witnessing about Jesus. And when I saw her I was greatly amazed.
Revelation 17:14
These kings and the beast will wage war against the Lamb, and the Lamb will conquer them, for He is the Lord of lords and the King of kings. And those who are called and chosen [by God], and who are faithful [to Him will share the victory] with the Lamb."
Revelation 19:19
Then I saw the beast [See 13:1ff], and the kings of the earth and their armies assembled together to wage war against the One who was riding on the horse [i.e., Christ. See verse 11] and His army.