These verses contain details about who the Beast from the Pit is. To be released from the Pit he had to be put there first. Fallen angels are the 'sons of God' mentioned in Ge:6. Being immortal the flood would not have killed them, the flood was to kill their children, the 6 fingered giants mentioned in Scripture. The wives of Noah's 3 sons were female giants and that is how they existed until the exodus wars. Angels are under the Law given in Re:21 and when the last giant died that Law died also and it was replaced by the 10 Commandments. Those 10 Laws are there for the whole time it takes for 2 bruises to be completed.
The cross was all things fulfilled concerning the bruise to the heel of the 'seed of Eve' and when Jesus said, 'It is finished.' moments before he died. When He says, 'It is done.' as He pours out the last vial that is referencing the completion of all things to do with the bruise to the serpent's head. That is Satan being chained up and sent to the same pit all fallen angels are at the moment. Enoch gave the prophecy and Moses confirmed that it was a past event.

And Enoch also,
the seventh from Adam,
prophesied of these,
saying, Behold,
the Lord cometh with ten thousands of his saints,

And he said,
The LORD came from Sinai,
and rose up from Seir unto them;
he shined forth from mount Paran,
and he came with ten thousands of saints:
from his right hand went a fiery law for them.

Satan is the falling star in the verse that indicated the 5th trump has sounded and the Beast is who is released from the Bottomless Pit. Together God gives then 42 months (1260 literal days) to fulfill the tribulation that must be fulfilled. (the latter days from De:4:30 prophecy)

And they had a king over them,
which is the angel of the bottomless pit,
whose name in the Hebrew tongue is Abaddon,
but in the Greek tongue hath his name Apollyon.

The counting of the kings starts back in Daniel. The few verses at the start of Re:13 is a reference to all of Da:7 and those beasts are referencing the kings that are aligned with the 4 metal kingdoms in Da:2 Neb is the 1st king and he is referenced as the 'head of gold'. He is a foreshadow of Christ as he is called the 'king of kings' and Christ is known as the 'KING OF KINGS' in Re:19. That is the first day of His return.

And there are seven kings:
five are fallen,
and one is,
and the other is not yet come;
and when he cometh,
he must continue a short space.
And the beast that was,
and is not,
even he is the eighth,
and is of the seven,
and goeth into perdition.
And the ten horns which thou sawest are ten kings,
which have received no kingdom as yet;
but receive power as kings one hour with the beast.

Neb= 1st king from the head of gold kingdom

O king,
art a king of kings:
for the God of heaven hath given thee a kingdom,
and strength,
and glory.

And wheresoever the children of men dwell,
the beasts of the field and the fowls of the heaven hath he given into thine hand,
and hath made thee ruler over them all.
Thou art this head of gold.

Now I Nebuchadnezzar praise and extol and honour the King of heaven,
all whose works are truth,
and his ways judgment:
and those that walk in pride he is able to abase.

The silver kingdom has 2 kings. It begins when Neb's son is killed.

2nd king
In that night was Belshazzar the king of the Chaldeans slain.
And Darius the Median took the kingdom,
being about threescore and two years old.

3rd king
So this Daniel prospered in the reign of Darius,
and in the reign of Cyrus the Persian.

4th king
And the rough goat is the king of Grecia:
and the great horn that is between his eyes is the first king.
Now that being broken,
whereas four stood up for it,
four kingdoms shall stand up out of the nation,
but not in his power.

The part above is Neb representing Greece and only 1 of the 4 Generals ruled over Jerusalem and it was overthrown by the time Rome took control.

5th king loses control of Jerusalem to Rome. Rome is the 6th king (the one that is) and the NT was written during that rule)

And out of one of them came forth a little horn,
which waxed exceeding great,
toward the south,
and toward the east,
and toward the pleasant land.
And it waxed great,
even to the host of heaven;
and it cast down some of the host and of the stars to the ground,
and stamped upon them.
he magnified himself even to the prince of the host,
and by him the daily sacrifice was taken away,
and the place of his sanctuary was cast down.
And an host was given him against the daily sacrifice by reason of transgression,
and it cast down the truth to the ground;
and it practised,
and prospered.

Da:8 is about the brass kingdom and it ends with the iron/clay kingdom beginning. That is on the day the 5th trump in Re:9 sounds. Alexander the Great is the 4th king and his rule through Greece lasted only a few weeks and then a general continued that rule. They lost control to who would be the 5th king and that king would have lost to to Rome in about 63BC. Rome's 500 year reign fulfills the DA:2 determination that the brass becomes a great dominion. The verses below cover that 500 year reign and Luke:21:24 shows it was the king over Jerusalem in 70AD when the 'time of the Gentiles' starts and when Re:11 starts there is 42 months left of the brass rule over Jerusalem. The two witnesses fulfill that role and God allows Satan and the Beast to be the kings over Jerusalem during that time. Jerusalem means 'City of God' and during the 4 days Satan and the Beast control that ground it is know as Satan's Babylon. Jerusalem is the only part of the earth not under their control once the 42 months starts. The first 4 trumps sound in 4 days and that puts the world under Martial Law. The red sword seal is a prophecy that show the sword left to the rulers of the nations in Romans:11 is used against the same people it was supposed to be protecting from evil

And there are seven kings:
five are fallen,
and one is,
and the other is not yet come;
and when he cometh,
he must continue a short space.
And the beast that was,
and is not,
even he is the eighth,
and is of the seven,
and goeth into perdition.
And the ten horns which thou sawest are ten kings,
which have received no kingdom as yet;
but receive power as kings one hour with the beast.

Satan is the 7th king and he rules during the 5 months that it takes for the 5th trump to be fulfilled and then the Beast acts as the next king, the 8th one. The healed wound is referencing his kingdom being taken from during the flood and it being restored for the final tribulation. 42 months is what all of Da:11 covers and 5 months for the 5th trump and 37 months (1110 days) for the 6th trump to unflod. It's last day is the day the 7th trump sounds and on that day Christs sends the Beast and the False Prophet to the fiery lake. Satan is sent to the Pit, all sinners are sent to the grave, specifically hell as they are dead but still awake like Jonas was. Both references below are covering the same event, the transition from the brass kingdom to the start of the iron/clay kingdom and the 3 1/2 years it will last. The last verse in Da;11 is the same event the 3rd woe verses in Re:11 are referencing.

And in the latter time of their kingdom,
when the transgressors are come to the full,
a king of fierce countenance,
and understanding dark sentences,
shall stand up.
And his power shall be mighty,
but not by his own power:
and he shall destroy wonderfully,
and shall prosper,
and practise,
and shall destroy the mighty and the holy people.
And through his policy also he shall cause craft to prosper in his hand;
and he shall magnify himself in his heart,
and by peace shall destroy many:
he shall also stand up against the Prince of princes;
but he shall be broken without hand.

And a mighty king shall stand up,
that shall rule with great dominion,
and do according to his will.

This helps understand who the harlot in Re:17 is aligned to and that related to the king in Da:11 that has a daughter. Satan and the Beast are the kings of the north and south in that chapter so any conflicts are done as a single plan rather than the conflicts being real. We would call them false flags.

And they worshipped the dragon which gave power unto the beast:
and they worshipped the beast,
Who is like unto the beast?
who is able to make war with him?
And there was given unto him a mouth speaking great things and blasphemies;
and power was given unto him to continue forty and two months.

Names not written means they have not repented. The book of life gets names entered at the time of conception rather than at first breath. Re:10 is the resurrection verses that come with the return and it happens from 3PM to 6PM on the day the 7th trump sounds. Sinners are sent to the grave just before that as all 7 vials are poured out from noon until 2:30 as there is a 1/2 hour of silence between the 2 events and in that time Christ will construct the temple that will serve as the House of Prayer for the 1,000 year reign.

The Beast's rule will also include the construction of a false throne and that is the image in Re:13 as well as what is being referenced in the references below.

And all that dwell upon the earth shall worship him,
whose names are not written in the book of life of the Lamb slain from the foundation of the world.

And he exerciseth all the power of the first beast before him,
and causeth the earth and them which dwell therein to worship the first beast,
whose deadly wound was healed.

And he had power to give life unto the image of the beast,
that the image of the beast should both speak,
and cause that as many as would not worship the image of the beast should be killed.

Let no man deceive you by any means:
for that day shall not come,
except there come a falling away first,
and that man of sin be revealed,
the son of perdition;
Who opposeth and exalteth himself above all that is called God,
or that is worshipped;
so that he as God sitteth in the temple of God,
shewing himself that he is God.

When ye therefore shall see the abomination of desolation,
spoken of by Daniel the prophet,
stand in the holy place,
(whoso readeth, let him understand
Then let them which be in Judaea flee into the mountains:
Let him which is on the housetop not come down to take any thing out of his house:
Neither let him which is in the field return back to take his clothes.
And woe unto them that are with child,
and to them that give suck in those days!
But pray ye that your flight be not in the winter,
neither on the sabbath day:
For then shall be great tribulation,
such as was not since the beginning of the world to this time,
nor ever shall be.

And arms shall stand on his part,
and they shall pollute the sanctuary of strength,
and shall take away the daily sacrifice,
and they shall place the abomination that maketh desolate.

This is 4 days before the Beast is sent to the fiery lake.

And when they shall have finished their testimony,
the beast that ascendeth out of the bottomless pit shall make war against them,
and shall overcome them,
and kill them.

The mark of the Beast simply means people accept his rule and pick up the rules without argument. Worship cannot happen as the image is not in it's place before the two witnesses are dead in the streets of Jerusalem and God ends that control before any man can worship Satan on a false throne.

And he causeth all,
both small and great,
rich and poor,
free and bond,
to receive a mark in their right hand,
or in their foreheads:
And that no man might buy or sell,
save he that had the mark,
or the name of the beast,
or the number of his name.

Consumers but things, they do not sell things. It is showing that all people on earth are included in the last tribulation and the 3rd woe alone is referred to as the 'great tribulation as it includes the battle at the start of the 1,000 year reign as well as the wrath at the end of that period.

And the third angel followed them,
saying with a loud voice,
If any man worship the beast and his image,
and receive his mark in his forehead,
or in his hand,

And the smoke of their torment ascendeth up for ever and ever:
and they have no rest day nor night,
who worship the beast and his image,
and whosoever receiveth the mark of his name.