Revelation 19:19

And I saw the beast, and the kings of the earth, and their armies, assembled to make war with the one sitting on the horse, and with his army.

Revelation 16:16

And he led them into the place called Har-Mageden in the Hebrew.

Revelation 16:14

for these are the spirits of demons, working miracles, which go forth to the kings of the whole earth, to lead them together into the war of the great day of God Almighty.

Revelation 11:7

And when they may finish their testimony, the beast which ascends up out of the bottomless pit will make war against them, and conquer them, and slay them.

Revelation 13:1-10

And I stood upon the sand of the sea. And I saw a beast rising up out of the sea, having ten horns and seven heads; and upon his horns ten diadems, and upon his heads names of blasphemy.

Revelation 14:9

And another, the third angel followed these, saying with a great voice, If any one worships the beast and his image, and receives a mark upon his forehead, or upon his hand,

Revelation 17:12-14

And the ten horns which you saw, are ten kings, who live not yet received a kingdom; but they receive authority as kings one hour with the beast.

Revelation 18:9

And the kings of the earth, who have committed fornication with her, and lived wantonly, will weep and wail over her, when they may see the smoke of her burning,

Revelation 19:11-14

And I saw the heaven open, and behold a white horse; and one sitting on him called, Faithful and True, in righteousness he both judges and wages war.

Treasury of Scripture Knowledge

Summary

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.

Bible References

I saw

Revelation 13:1
And I stood upon the sand of the sea. And I saw a beast rising up out of the sea, having ten horns and seven heads; and upon his horns ten diadems, and upon his heads names of blasphemy.
Revelation 14:9
And another, the third angel followed these, saying with a great voice, If any one worships the beast and his image, and receives a mark upon his forehead, or upon his hand,
Revelation 16:14
for these are the spirits of demons, working miracles, which go forth to the kings of the whole earth, to lead them together into the war of the great day of God Almighty.
Revelation 17:12
And the ten horns which you saw, are ten kings, who live not yet received a kingdom; but they receive authority as kings one hour with the beast.
Revelation 18:9
And the kings of the earth, who have committed fornication with her, and lived wantonly, will weep and wail over her, when they may see the smoke of her burning,

Him

Revelation 19:11
And I saw the heaven open, and behold a white horse; and one sitting on him called, Faithful and True, in righteousness he both judges and wages war.