When researching Biblical chronology, it would be well to start with the book of Revelation, chapter 12, as it speaks of an event which happened long before the creation of Adam, and the consequences are still with us today. The four entities mentioned above are brought together into one collective category at Revelation 12:9 which states:
“And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angelsG32 were cast out with him.” It’s imperative to grasp that the designations “dragon”, “serpent, and “Devil” are simply substitute labels for “Satan”!
It should immediately become evident that John, in his Revelation, grouped these four allegorical symbols as having a common agenda. Notice especially the words, “... he was cast out into the earth, and his angelsG32 were cast out with him.” Firstly, this implies an angel leader, and secondly, a group of angel followers. Jude 1:6 explains this in greater detail thusly:
“And the angelsG32 which kept not their first estateG746, but left their own habitationG3613, he hath reserved in everlasting chains under darkness unto the judgment of the great day.”