Actually, there is a gap in Genesis where the dimension of time becomes relevant only in the way that timelessness does become relevant to time ?? We just do not think in those terms of things only happening in the "now", without past or future, but science theory shows us that it and more unknown dimensions exist without the knowledge of man.
When a third of the angels were cast down to earth after rebelling with Lucifer against the throne of God, where that fits in to the history of man is only shown by what is written in the scriptures - and it isn't that much. Could satan have established himself on earth and caused the void and chaos that was there before God changed it for mankind's sake. Basically, anyone who has the power over time and eternity can do just about what they want with historical events. I see this illustrated with science fiction stories all the time, based on scientific theory, yet when people apply this, thinking of the possibilities that God or a spiritual being with great power like the devils, people suddenly become narrow minded as to the possible things that might be able to be done for good by God or for by deception and evil - such as in the devil's case. There is a lot of speculation that may be fun to think about, but it still draws away from God's intention in creating man and putting him in a garden with a devil. Therein lies a formula for some kind of better and glorious ending. Obviously, God did not give us a complete manual of history and the happenings of the devil, but what He wants us to strive for in love, achieving love with the gift of life He has given us as His creation and through the divine nature of His Son who has redeemed all who will come to Him. By letting evil exist through free will, God has set in motion events that will end with great glory, with love existing, and evil being finally defeated. Nothing can be lost to Him - no life or soul that does not choose to be so.
Obviously, evil came about in the brother of Abel, and Cains descendants were later carried on through Noah's son, Japeth, in whom later comes Magog and others through history that have come up under the side of evil - Esau and the Edomites for another important one who is related to Jacob as twin brother but losing his birthright to the younger. Their names are spoken of repeatedly in the prophecies for the end times, but knowing and understanding the origins and names is a great lot of work. Isaac Newton, the genuis scientist who desribed gravity in mathematical terms, wrote a great work on the prophecies of God in the Bible, especially the book of Daniel. It is probably the definative work, if interested, and includes some of this type of info.
Using a commentary along with these verses helps a lot, too. Like Matthew Henry, John Gill, or Barnes commentaries - all free to use online.
Rev. 12:7 And there was war in heaven, Michael and his angels waging war with the dragon. The dragon and his angels waged war,
8 and they were not strong enough, and there was no longer a place found for them in heaven.
9 And the great dragon was thrown down, the serpent of old who is called the devil and Satan, who deceives the whole world; he was thrown down to the earth, and his angels were thrown down with him.