20 The ram which you saw having two horns are the kings of Media and Persia.
Daniel 8:20 Cross References - MKJV
Daniel 8:3
3 Then I lifted up my eyes, and looked. And behold, a ram with two horns stood before the canal having 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 I, in the first year of Darius the Mede, I was standing for a supporter and for a fortress for him.
2 And now I will declare to you the truth. Behold, there shall stand up yet three kings in Persia. And the fourth shall be far richer than all of them. And by his strength, through his riches, he shall stir up all against the kingdom of Greece.