2 Thessalonians 1:7
and to you, who are in trouble, rest with us, at the revelation of the Lord Jesus from heaven,
Revelation 16:14-16
for they are the spirits of demons, working miracles, which go forth unto the kings of the earth and of the whole world, to bring them together to the battle of that great day of God almighty.
Revelation 19:14
And the armies in heaven followed Him on white horses, clothed in fine linen white and clean.
Revelation 19:19-20
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.
Revelation 20:8-9
Satan shall be loosed from his confinement, and shall go forth to deceive the nations, that are in the four corners of the earth, Gog and Magog, to gather them together to war, whose number is as the sand of the sea.