They had a king over them who was the angel of the deep pit [See verses 1-2]. His name in Hebrew was "Abaddon," and in Greek it was "Apollyon" [Note: These words both mean "Destroyer"].

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].