Then I saw the beast and the kings of the earth with their armies assembled to wage war against the One seated on the horse, and against His army.

Revelation 11:7
When the two witnesses have finished their testimony, the beast that comes up from the Abyss will wage war with them, and will overpower and kill them.

Revelation 13:1
Then I saw a beast with ten horns and seven heads rising out of the sea. There were ten royal crowns on its horns and blasphemous names on its heads.

Revelation 16:14
These are demonic spirits that perform signs and go out to all the kings of the earth, to assemble them for battle on the great day of God the Almighty.

Revelation 16:16
And they assembled the kings in the place that in Hebrew is called Armageddon.

Revelation 19:11
Then I saw heaven standing open, and there before me was a white horse. And its rider is called Faithful and True. With righteousness He judges and wages war.

Revelation 19:21
And the rest were killed with the sword that proceeded from the mouth of the One seated on the horse. And all the birds gorged themselves on their flesh.

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.