Daniel 8:1-4

In the third year of the reign of King Belshazzar a [second] vision appeared to me, Daniel, [this was two years] after the one that first appeared to me. I looked in the vision and it seemed that I was at the citadel of Susa, [the capital of Persia], which is in the province of Elam; and I looked in the vision and I saw myself by the Ulai Canal. Then I raised my eyes and looked, and behold, there in front of the canal stood a [lone] ram (the Medo-Persian Empire) which had two horns. The two horns were high, but one (Persia) was higher than the other (Media), and the higher one came up last. I saw the ram (Medo-Persia) charging westward and northward and southward; no beast could stand before him, nor was there anyone who could rescue [anything] from his power, but he did as he pleased and magnified himself. [Dan 8:20]