What is the battle of Armageddon?

Regarding the battle of Armageddon, Mr. Graham has stated: "The Bible plainly forecasts the coming of yet another great war. It will be a war to eclipse anything the world has ever seen. It will embrace most of the nations of the world; and its focal point will be in the Middle East, where the armies of the world will some day deploy themselves, centering at Mount Megiddo. This great war has been called the battle of Armageddon. In the midst of this terrifying war that could destroy civilization the Lord Jesus Christ will return to this earth in glory and power to judge the nations of the world and set up His own glorious kingdom.

"The Scripture describes this great battle in the sixteenth chapter of the book of Revelation. The sixth angel will pour out his vial upon the great river Euphrates. We are told that the waters of the Euphrates River will be 'dried up, that the way of the kings of the east might be prepared.' The dry riverbed will permit unhindered passage of the great armies of the East to the scene of the battle. Unclean spirits, demons, will go out into the world to the kings of the earth 'to gather them to the battle of that great day of God Almighty' (verses 12-14).

"The armies of the world will focalize on a point known as Armageddon, the Mount of Megiddo, and there the final world conflict will take place. The extent of this conflict is indicated in the ninth chapter of Revelation, where the army that is to cross the Euphrates River is described; and in that chapter the immensity of this final world war is carefully described ... We are aware of the shuffling of the stage in preparation for the greatest battle of all time that will certainly take place in the years ahead. The crisis of the present hour should shatter the optimism concerning human nature of every person listening to my voice. The only reliable hope for the future must be bound up in a living faith in Jesus Christ as Savior and Lord."