REVELATION 12"1Now a great sign appeared in heaven: a woman clothed with the sun, with the moon under her feet, and on her head a garland of twelve stars. 2Then being with child, she cried out in labor and in pain to give birth. 3And another sign appeared in heaven: behold, a great, fiery red dragon having seven heads and ten horns, and seven diadems on his heads. 4His tail drew a third of the stars of heaven and threw them to the earth. And the dragon stood before the woman who was ready to give birth, to devour her Child as soon as it was born. 5She bore a male Child who was to rule all nations with a rod of iron. And her Child was caught up to God and His throne. 6Then the woman fled into the wilderness, where she has a place prepared by God, that they should feed her there one thousand two hundred and sixty days. Satan Thrown Out of Heaven 7And war broke out in heaven: Michael and his angels fought with the dragon; and the dragon and his angels fought, 8but they did not prevail, nor was a place found for them in heaven any longer. 9So the great dragon was cast out, that serpent of old, called the Devil and Satan, who deceives the whole world; he was cast to the earth, and his angels were cast out with him. 10Then I heard a loud voice saying in heaven, “Now salvation, and strength, and the kingdom of our God, and the power of His Christ have come, for the accuser of our brethren, who accused them before our God day and night, has been cast down. 11And they overcame him by the blood of the Lamb and by the word of their testimony, and they did not love their lives to the death. 12Therefore rejoice, O heavens, and you who dwell in them! Woe to the inhabitants of the earth and the sea! For the devil has come down to you, having great wrath, because he knows that he has a short time.” This biblical passage mentions the expulsion of Satan from heaven in a war against the angels of God after the beginning of the 1260 days, we can interpret this fact as something that has already happened throughout the history of mankind, a future event at the end of time, or simply Saint John was referring to the expulsion of Lucifer that occurred before the creation of the world, or the overthrow of it when the redemption effected by Christ occurred?
My understanding of this book of Revelation is that it is multilayered--somewhat circular in that it can be all of those things at the same time. "What is what was and what is to be."