Which is why it’s referenced as “Mystery Babylon” because America was unknown at the time.
That's really Mystery, Babylon the great. It has a comma between it.
It was a mystery until it was revealed way back when GOD revealed it to John. Around 1950 years ago ( give or take a few decades). It's not a mystery to us now, and wasn't a mystery to the saints then after it was revealed to John.
Many saints have understood that Babylon is the same system running through the history of this world through governments ever since the tower of Babel. Babylon is man's attempt to create government without GOD. To make a name for himself.
It can seem like a mystery to people ignorant of the Bible. But the Bible tells us people perish for a lack of knowledge. It's because they didn't seek to understand it.
Seek and you shall find. Knock and the door will be open to you.
The Book was written on Babylon way back when GOD revealed it to Daniel.
Daniel and Revelation are 2 books that go together when talking about end times prophecy.
Daniel saw it from a wide angle as it relates to the history of the world, and John saw it in more detail focused on Jacob's trouble (the last 7 years before Christ's return).
The United States is a part of Babylon, but it's not the complete version of it. It's just a piece of it, and it's not the final piece of it. It's playing it's part to bring the end of the age.
There is going to be a world government system that takes power away from the United States and the other governments of the world. And then there will be another one that follows that one for a very short time (mankind's last attempt to fight GOD).