20 The ram which thou saw, that had the two horns, they are the kings of Media and Persia.
Daniel 8:20 Cross References - ACV
Daniel 8:3
3 Then I lifted up my eyes, and saw, and, behold, there stood before the river a ram which had two horns. And the two horns were high, but one was higher than the other, and the higher came up last.
Daniel 11:1-2
1 And as for me, in the first year of Darius the Mede, I stood up to confirm and strengthen him.
2 And now I will show thee the truth. Behold, there shall stand up yet three kings in Persia, and the fourth shall be far richer than them all. And when he has grown strong through his riches, he shall stir up all against the realm of Greece.