There was a battle in heaven in which Michael and his angels fought the dragon. The dragon and his angels were thrown out of heaven to earth. A loud voice from heaven declared the victory and the sovereignty of God, and lamented the tragic struggle coming to people on earth.

Revelation 12:7-12

7 In the vision I saw that there was a battle in heaven. Michael and the angels that he commanded fought against the dragon. The dragon and his angels fought back against Michael and his angels. 8 But the dragon did not win the battle, so God did not allow the dragon and his angels to stay in heaven any longer. 9 The huge dragon was thrown {Michael and his angels threw the huge dragon} out of heaven. The dragon is the ancient serpent, the one who is called the Devil and Satan. He is the one who deceives people all over the earth. He was thrown down to the earth, along with all his angels. 10 Then I heard someone in heaven shout loudly, saying,

Now our God has saved his people by his power, and he rules everyone!

Now the Messiah, the one who is the supreme ruler whom God appointed,

has authority to rule all people, because our God has thrown out of heaven the one who accuses our fellow believers!

The dragon is the one who accuses them day and night before our God,

saying that they have sinned and that God ought to punish them.

11 Our fellow believers overcame the dragon because they never stopped trusting

(OR, never stopped telling people about) Jesus,

and because they trusted in what Jesus, the one who is like a lamb, accomplished when his blood flowed when he died.

Even though those believers wanted to live,

they were willing to let people kill them for speaking the truth about him.

12 So, all you angels living [MTY] in heaven, rejoice!

But terrible things will happen to you ungodly people who [MTY] live on the earth and on the ocean, because the devil has come down to you!

He is very angry because he knows that he has only a short time during which he can harm people.