Adam Clarke on Daniel 8:6

And he came to the ram - This and the following verse give an account of the overthrow of the Persian empire by Alexander.

And ran unto him in the fury of his power - The conflicts between the Greeks and the Persians were excessively severe. Alexander first vanquished the generals of Darius, at the river Granicus, in Phrygia; he next attacked and totally routed Darius, at the straits of Issus, in Cilicia; and afterwards at the plains of Arbela, in Assyria. One can hardly read these words, says Bp. Newton, "the ram - which I had seen standing by the river, ran unto him in the fury of his power," without having the image of Darius' army standing and guarding the river Granicus and of Alexander on the other side, with his forces plunging in swimming across the stream, and rushing on the enemy, with all the fire and fury that can be conceived.