12 The sixth angel poured out his bowl on the 1great river, the Euphrates; and 2its water was dried up, so that 3the way would be prepared for the kings 4from the east *.

Armageddon

13 And I saw coming out of the mouth of the 5dragon and out of the mouth of the 6beast and out of the mouth of the 7false prophet, three 8unclean spirits like 9frogs;
14 for they are 10spirits of demons, 11performing signs, which go out to the kings of the 12whole world, to 13gather them together for the war of the 14great day of God, the Almighty.
15 ("Behold, 15I am coming like a thief. 16Blessed is the one who stays awake and keeps his clothes, 17so * that he will not walk about naked and men will not see his shame.")
16 And they 18gathered them together to the place which 19in Hebrew is called 20Har-Magedon.