It's a very deep subject which you would have to research yourself to fully understand, but, generally...
In the bible, beasts are used to represent various kingdoms throughout history. For example...
Dan 7:17 These great beasts, which are four, are four kings, which shall arise out of the earth.
...and the dragon is Satan...
Rev 20:2 And he laid hold on the dragon, that old serpent, which is the Devil, and Satan, and bound him a thousand years,
In Revelation, "The beast" is a man -a ruler -but "the beast that rises from abyss" is the kindom he will rule. There is also a "second beast" -a false religion generally, and specifically "the false prophet" -one specific man who will be able to perform miraculous things, but will not be of God.
The beast and his kingdom in Revelation are also spoken of in Daniel 7 -and other chapters in Daniel explain in more detail....
Rev 17:8 The beast that thou sawest was, and is not; and shall ascend out of the bottomless pit, and go into perdition: and they that dwell on the earth shall wonder, whose names were not written in the book of life from the foundation of the world, when they behold the beast that was, and is not, and yet is.
Rev 17:10 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.
Rev 17:11 And the beast that was, and is not, even he is the eighth, and is of the seven, and goeth into perdition.
Rev 17:12 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.
Rev 17:13 These have one mind, and shall give their power and strength unto the beast.
Rev 17:14 These shall make war with the Lamb, and the Lamb shall overcome them: for he is Lord of lords, and King of kings: and they that are with him are called, and chosen, and faithful.
Dan 7:19 Then I would know the truth of the fourth beast, which was diverse from all the others, exceeding dreadful, whose teeth were of iron, and his nails of brass; which devoured, brake in pieces, and stamped the residue with his feet;
Dan 7:20 And of the ten horns that were in his head, and of the other which came up, and before whom three fell; even of that horn that had eyes, and a mouth that spake very great things, whose look was more stout than his fellows.
Dan 7:21 I beheld, and the same horn made war with the saints, and prevailed against them;
Dan 8:23 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.
Dan 8:24 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.
Dan 8:25 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.
Dan 11:44 But tidings out of the east and out of the north shall trouble him: therefore he shall go forth with great fury to destroy, and utterly to make away many.
Dan 11:45 And he shall plant the tabernacles of his palace between the seas in the glorious holy mountain; yet he shall come to his end, and none shall help him.
etc...etc...
How this king of fierce countenance is the Assyrian and why America is his essentially first target I'll explain in more detail later, but, generally, the latter requires the understanding of the fact that many in America, etc... are of the "lost" tribes of the house of Israel -and, though they are no longer called by that name, the prophecies which refer to them refer to the places where they now dwell and have power. I've begun to explain it in previous posts, but not in great detail.
Isa 28:10 For precept must be upon precept, precept upon precept; line upon line, line upon line; here a little, and there a little: