Revelation 20:9

And they went up over the breadth of the earth, and compassed the camp of the saints about, and the beloved city: and fire came down out of heaven, and devoured them.

And they went up over the breadth of the earth ... All of the world will be swallowed up by the empire of evil; and their vicious hatred of the truth and of Christ will not rest as long as any souls, no matter how few, are true believers in Christ and his holy religion. Therefore, they will move to destroy utterly even the remnant of believers left. That is the picture when the judgment falls.

And encompassed the camp of the saints about ... This has no reference whatever to some locale where Christians will be encamped, as in an army, and barricaded against evil. No! It just means that the devil will finally take it in hand to destroy, utterly and finally, the last vestiges of truth and righteousness upon the earth. Fire from heaven will be God's answer to that decision on the part of Satan. Ladd, and many others, envision the literal Jerusalem as the earthly scene of this event;[47] but there is no basis in the bible for such a notion.

And the beloved city ... This symbolizes the true church of God, certainly not literal Jerusalem which crucified Christ and both earned and received the outpouring of the wrath of God upon her as a consequence. This racial thing about literal Jews that gets into millennial calculations is as unchristian and unreasonable as any nonsense ever advocated. Long ago, God thundered the edict from heaven that there is "NO DISTINCTION" between Jew and Gentile (Romans 3:22; 10:12), and the Christian is gullible indeed who allows himself to accept any theory of "distinction" regarding Jews, Gentiles, or any other races of mankind. It is just as Scriptural to suppose that God has separate plans for the Albanians, the Laps, the North American Indians, or the Japanese, as it is to imagine that racial Jews shall enter in any special manner into God's plans for the future.

And fire came down from heaven and devoured them ... Not much of a "war" was it? God spake, and it was done. God settled the full account with evil in a single fiery blast.