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.
Revelation 16:16
So, the [demonic] spirits assembled the kings together at the place which is called "Armageddon" in Hebrew. [Note: "Armageddon" means "mountain of Megiddo" and was a site in northwestern Palestine where several decisive battles had been fought centuries earlier. See Judges 4,5,7].
Revelation 16:14
For they are spirits of demons, which perform [supernatural] signs. These spirits go out to the kings of the whole world to assemble them for battle on the great day of Almighty God.
Revelation 11:7
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 13:1-10
And I saw a beast coming up out of the ocean. It had ten horns and seven heads, and [it had] ten crowns on his horns and on each head there was a blasphemous name [i.e., a name that slandered God].
Revelation 14:9
Then a third angel followed them. He said in a loud voice, "If anyone worships the beast and his statue, and receives a mark on his forehead or on his hand,
Revelation 17:12-14
"And the ten horns you saw are ten kings, who have not received a kingdom yet, but for one hour they will receive authority as kings, along with the beast.
Revelation 18:9
And the kings of the earth, who committed sexual immorality with her, and indulged in luxurious living with her, will cry and mourn over her when they see the smoke of her burning [i.e., the city of Babylon. See verse 2].
Revelation 19:11-14
Then I saw heaven open, and there before me was a white horse whose rider was called "Faithful and True." And He [i.e., Christ] judges and wages war in a just way.