The Beasts/Kingdoms:
1: Babylon
2: Medo/Persia
3: Greece
4: Rome
And the fourth kingdom
I agree
We can correlate with historical events .. and postulate that
these kingdoms are fulfilled.
However there is no consensus as to who the feet and toes are...
Or babylon ..... So now we get into the realm of opinions and theories ... fun to debate and study ... but not central to salvation. I see .. Ephesians 1
after that ye heard the word of truth, the gospel of your salvation: in whom also after that ye believed, ye were sealed