Revelation 12 focuses on Satan and his war against the Church. Satan previously was able to enter God’s courts, albeit briefly, as he wandered to and fro on the earth (Job 1). The Accuser—since Satan is a title like Christ and not a proper name—opposes the saints, even though his accusations are frequently false (Zechariah 3:1-5; Jude 9; John 8:44). Even if he speaks about the past, he does not speak the truth, because the saints, covered with the Lord’s righteousness, can no longer be justly accused of them. They are gone, never to be brought up again (Psalm 103:12). Satan’s accusations, then, are a direct assault on God, which is why he is rebuked for speaking against the saints.
Satan’s foolishness knows no bounds, however, because he sought to destroy the male child of Revelation 12:5. This action prompted a reaction from heaven. The war of Revelation 12:7 is against the dragon, and the dragon is in a defensive posture. His judgment has come, because the fullness of his sin flowed forth from his attempted murder of the boy. God is not deaf to the plight of His Church on earth, and all the powers of heaven wage war in her defense.
The identity of Michael is a disputed question. Some think that this refers to Christ Himself. Michael, whose name means “Who is like God?”, is described in Jude 9 as an archangel. This is sometimes rejected on the grounds that Jude is part of the antilegomena (a weak argument, in my opinion, since Revelation itself belongs to that category). Further, the corresponding passage in Zechariah 3 states that the Lord Himself rebukes Satan, a statement attributed to Michael in Jude. The two are not mutually exclusive. The Lord is often described as speaking through agents, just as we often use similar language to say things like “The king waged war on the kingdom.” Even if the king’s generals and soldiers actually carried out the war, that hardly means that the king had no part in it.
Regardless of who Michael is—and I tend to think that it is the archangel—it does not change the meaning of the passage. The outcome of this war against the devil is his utter defeat and subsequent banishment from heaven. Nor do I think that we need to figure out the timing of this war. The general message is clear: even as the devil wages war on earth against the Church, he is already defeated and his final defeat is certain. He is fighting a losing battle, and God Himself fights for His Church. Whatever he might throw at us, Satan’s doom is certain, and he cannot win.
I think it’s worthwhile to mention that the word “dragon” carries a lot of cultural baggage with it. The image of a four-legged, winged, fire-breathing lizard is a much later concept. “Dragon” or perhaps “drake” in Greek describes a large snake. It is used in conjunction with the more general term “serpent” in Revelation 12:9. He is not an ordinary snake, to be sure, since he is described as having “seven heads and ten horns, and on his heads seven diadems” (Revelation 12:3). But we must be careful so that we do not impose our cultural images upon the Bible. Yet this imagery recalls Genesis 3, where the snake tempts Eve into eating the forbidden fruit. As Satan sought our destruction from the very beginning, he remains a “roaring lion, seeking someone to devour” (1 Peter 5:8).
However, Satan is defeated by “the blood of the Lamb and by the word of their testimony” (Revelation 12:11). The death and resurrection of Jesus silenced the devil who had previously tried to tempt Him to sin. Christ’s resurrection proves that the devil is a liar, because it is undeniable proof of His righteousness. Yet Satan is also defeated by the witness of the saints, because the reign of Christ is not yet complete (Hebrews 2:8; 1 Corinthians 15:25). Bearing witness about the hope within us is an assault on the powers of darkness (2 Corinthians 10:4). This is Christ’s work within us, engaging us as soldiers in His victorious campaign to put all things under His feet.
Therefore, Satan should not make us abnormally afraid, as if he had the power to do as he pleases. “Resist him, firm in your faith, knowing that the same kinds of suffering are being experienced by your brotherhood throughout the world” (1 Peter 5:9). The shield of faith extinguishes his flaming darts (Ephesians 6:16). He should not be underestimated, of course. His anger is fierce and he is unwavering in his rage. But he stood no chance against heaven. If God Himself is for us, who can be against us (Romans 8:31)? Those who are with us are more than those who are with him (2 Kings 6:16).