This conundrum of the colonies defeating the British, the miraculous rise to power of the United States, and the obvious attack from within bringing the once proud nation down, was explained to the prophet Ezra by an emissary angel.
Ezra had dreamed of a 3 headed eagle. But the dream confused him, so God sent an angel to interpret. The main head of the eagle conquered most of the world and was a great and wealthy empire. But this great head, this great empire, would wither and be supplanted by a second even more powerful head. This second eagles head would commit blasphemy and terrorize many, only in the end to be consumed by a 3rd small head from within.