The ram which thou sawest having two horns are the kings of Media and Persia.
Daniel 8:3
And I lift up mine eyes, and look, and lo, a certain ram is standing before the stream, and it hath two horns, and the two horns [are] high; and the one [is] higher than the other, and the high one is coming up last.
and, now, truth I declare to thee, Lo, yet three kings are standing for Persia, and the fourth doth become far richer than all, and according to his strength by his riches he stirreth up the whole, with the kingdom of Javan.