Whenever you speak to someone about demons, the subject of fallen angels always arise. In fact they were taught that 1/3 of them were deceived by Satan and become demons.
There was never a war in heaven.
Then war broke out in heaven. Michael and his angels fought against the dragon, and the dragon and his angels fought back. But he was not strong enough, and they lost their place in heaven. The great dragon was hurled down—that ancient serpent called the devil, or Satan, who leads the whole world astray. He was hurled to the earth, and his angels with him.
The dragon who was mentioned in Revelation 12 is one with 7 heads. It is later told this dragon was thrown down and a beast arose.
This is what is said about the beast.
They are also seven kings. Five have fallen, one is, the other has not yet come; but when he does come, he must remain for only a little while.
The Beast mentioned there is Rome.
What John meant by the dragon sweeping one third of the stars is that 1/3 of Israel is going to be destroyed in AD70.
This is clearly seen here.
The first angel sounded his trumpet, and there came hail and fire mixed with blood, and it was hurled down on the earth. A third of the earth was burned up, a third of the trees were burned up, and all the green grass was burned up.
A third of mankind was killed by the three plagues of fire, smoke and sulfur that came out of their mouths.
It’s not a war in heaven. It was a war in Jerusalem.
This is because before AD70, the Jews thought Jerusalem and its temple was where God was.