Before the seventh trumpet there was an interlude which introduced us to the mighty angel with the little scroll and the two witnesses. After the seventh trumpet was blown, there was a pronouncement that fast forward to God's eternal reign. But before that, another interlude gave John a vision of the conflict between God and the forces of evil – a war that started in heaven and continued on earth. The vision gives the reason why there is tribulation and why judgment is necessary.
John saw in heaven a pregnant woman clothed with the sun, with the moon under her feet and a crown of 12 stars on her head (12:1-2). She gave birth to a son, a male child, who will rule all the nations with a rod of iron (12:5a).
Then John saw a great red dragon with seven heads and ten horns and seven crowns on its heads (12:3). This dragon is clearly identified as Satan in Rev. 12:9. Satan was described as ...
Thus Satan is aptly portrayed as a dragon, a fearsome beast.
The dragon's tail swept a third of the stars out of the sky and flung them to the earth (12:4). This is probably a reference to his first rebellion against God. A third of the stars are the fallen angels who revolted with Satan at his fall (Isa. 14:12-17; Ezek. 28:12-14).
The dragon stood in front of the woman who was about to give birth, so that it might devour her child the moment he was born (12:4b). This is a flashback to King Herod, an instrument of Satan, trying to kill the child, Jesus (Matt. 2:3-8). But the child was caught up to God and to His throne (12:5). The "catching up" probably refers to Christ's ascension, showing the triumphant consummation of human history through Jesus Christ, ruling with a rod of iron.
This beast rising out of the sea is taken by many to indicate that he would come from the great mass of humanity, namely the Gentile powers of the world. Satan is looking for people whom he can enter, empower and use to dominate the world and persecute the rest of the woman's children and he found the beast of the sea (cf., Judas Iscariot in Luke 22:3). Satan's offer of the kingdoms of this world was rejected by Christ (Matt. 4:8-10) but accepted by the beast from the sea so he gave the beast his authority and power (13:2).
Satan is real and active today, prowling around like a roaring lion, looking for someone to devour (2 Pet. 5:8).
Can we ever overcome this dreadful and powerful dragon? Yes, we can! Rev. 12:11 gives us a clue. And they (the accused) OVERCAME him ...