Very good question. There is a 10 nation Confederacy mentioned, and most Biblical scholars see the Roman Empire being reborn, led by the Anit-Christ. The world is divided, economically, politically, and militarily, into these various 10 kingdoms, but it is all a ruse, because the Anti-Christ ultiately enslaves all in Revlation 13 (except for those who resist) economically. But, nowhere in this description of the 10 kingdoms, or in Revelation, including the battles, do we see a clear description of the USA. We see Israel and other nations mentioned clearly by name, including Libya, Iran, Iraq Ethiopia, and very possibly China and Russia, but not the USA.
Bttt