Charles Ellicott Commentary Daniel 8:6

"And he came to the ram that had the two horns, which I saw standing before the river, and ran upon him in the fury of his power." — Daniel 8:6 (ASV)

Ran to him.— The wonderful rapidity of Alexander’s movements, incredible if it were not so well attested in history, is here pointed out. From the battle of Granicus to that of Arbela only three years elapsed. During this brief period, the whole Persian empire fell to pieces.