Armageddon is a terrible battle or war that some people think will lead to the total destruction of the world or the human race. a terrible battle that will destroy the world. In the New Testament, the place where the kings of the earth under demonic leadership will wage war on the forces of God at the end of history. Armageddon is mentioned only in the Revelation to John. The name may mean "Mountain of Megiddo," a reference to the city of Megiddo, which held strategic importance in Palestine. Other biblical references suggest Jerusalem as the battle site