Quintus Curtius Rufus, History of Alexander 8.14.1

8.14.1

Iamque agmen in cornua divisum ipse ducebat, cum Poro nuntiatur armis virisque ripam obtineri et rerum adesse discrimen. Ac primo humani ingenii vitio spei suae indulgens Abisaren belli socium — et ita convenerat — adventare credebat.

He was already in full march at the head of his army, which he had divided into two columns, when the tidings reached Porus that the bank was occupied by a military force, and that the crisis of his fortunes was now imminent. In keeping with the infirmity of our nature, which makes us ever hope the best, he at first indulged the belief that this was his ally Abisares come to help him in the war as had been agreed upon. But soon after, when the sky had become clearer, and showed the ranks to be those of the enemy, he sent 100 chariots and 4000 horse to obstruct their advance. The command of this detachment he gave to his brother Hages. Its main strength lay in the chariots, each of which was drawn by four horses and carried six men, of whom two were shield-bearers, two, archers posted on each side of the chariot, and the other two, charioteers, as well as men-at-arms, for when the fighting was at close-quarters they dropped the reins and hurled dart after dart against the enemy. But on this particular day these chariots proved to be scarcely of any service, for the storm of rain, which, as already said, was of extraordinary violence, had made the ground slippery, and unfit for horses to ride over, while the chariots kept sticking in the muddy sloughs formed by the rain, and proved almost immovable from their great weight. Alexander, on the other hand, charged with the utmost vigour, because his troops were lightly armed and unencumbered.