Adam Clarke on Revelation 12:7

Rev 12:7 per Adam Clarke

There was war in heaven - In the same treatise, fol. 87, 2, on Exo 14:7, Pharaoh took six hundred chariots, we have these words: "There was war among those above and among those below, והמלחמה היתה חזקה בשמים vehammilchamaĥ hayethah chazakah bashshamayim, and there was great war in heaven." Of Michael the rabbins are full. See much in Schoettgen, and see the note on Jde 1:9.

The dragon - and his angels - The same as Rab. Sam. ben David, in Chasad Shimuel, calls סמאל וחיילותיו Samael vechayilothaiv, "Samael and his troops;" fol. 28, 2. Rev 12:7 per John Edward Clarke

And there was war in heaven - As heaven means here the throne of the Roman empire, the war in heaven consequently alludes to the breaking out of civil commotions among the governors of this empire.

Michael and his angels fought against the dragon - Michael was the man child which the woman brought forth, as is evident from the context, and therefore signifies, as has been shown already, the dynasty of Christian Roman emperors. This dynasty is represented by Michael, because he is "the great prince which standeth for the children of God's people." Dan 12:1.

And the dragon fought and his angels - Or ministers.