When did Satan rebelled and take a third of the angels?
Satan's rebellion, in which he took a third of the angelic host, occurred before Genesis 1:2, during the interval prior to the creation account. The passage depicts this as the dragon's tail drawing a third of the stars of heaven.
Les explains that the great red dragon is a symbolic picture of Satan, and the stars of heaven his tail drew are the angels he influenced. This rebellion happened clear back before Genesis 1:2, in the interval when Satan rebelled against God's authority and took a third of the angelic host with him. Later, the dragon stood before the woman Israel to devour her child, the Christ, prompting the decree to kill all boy babies under age two.