12 Then the sixth angel poured out his bowl on the great river Euphrates, and its water was dried up, so that the way of the kings from the east might be prepared.
13And I saw three unclean spirits like frogs coming out of the mouth of the dragon, out of the mouth of the beast, and out of the mouth of the false prophet.
14For they are spirits of demons, performing signs,
which go out to the kings of the earth and of the whole world, to gather them to the battle of that great day of God Almighty.
For those who have understanding, the River Euphrates is a metaphor for Ball worship/idolatrous worship and the start of the Islamic religion caused the idolatrous worship in the region of the River Euphrates to finally disappear.
The Three unclean frog like spirits like frogs were seen during the 9/11 event in 2001.
40 or so years after the 9/11 event the kings of the earth will be drawn so that they will gather to the battle on the great day of the Lord at Armageddon.
The gathering of the Kings of the earth in around 20 years' time will signify the end of the Little Horns ability to trample God's sanctuary and His earthly hosts which will conclude after 2,300 continuous years which began around the year 250 BC, around 70 years after the death of Alexandra the Great. The Little Horn is one of the wicked fallen Heavenly hosts who will be judged for their part in the trampling of God's sanctuary and His earthly hosts over this 2,300-year period. Isaiah 24:21-22 tells us the God will judge the heavenly hosts in heaven and the kings of the earth on the earth and together they will be gathered together and imprisoned in a pit, i.e., the Bottomless pit, for many days to await the time of their punishment.
Yes, America will be among the countries that will be present at Armageddon to be judged. America and the other "Super Powers" will lose their domination over other countries and there will be a big shift in the power balance that will operate during the seventh age during the first 1,000 years of this age.
Even now many countries, including the USA are experiencing God's wrath with them and these countries are presently being fill with people like caterpillars who will raise a shout up over them because they have acted God Like in the things that they have tried to do.
Shalom