of his cavalry, he took the greater part of that force, and marched along against the left wing of the enemy for the purpose of making an attack in this direction. Against the right wing he sent Coenus with his own regiment of cavalry and that of Demetrius, with instructions to keep close behind the barbarians when they, seeing the dense mass of cavalry opposed to them, should ride out to fight them. Seleucus, Antigenes, and Tauron were ordered to lead the phalanx of infantry, but not to engage in the action until they observed[1] the enemy's cavalry and phalanx of infantry thrown into disorder by the cavalry under his own command. But when they came within range of missiles, he launched the horse-archers, 1000 in number, against the left wing of the Indians, in order to throw those of the enemy who were posted there into confusion by the incessant storm of arrows and by the charge of the horses. He himself with the Companion cavalry marched along rapidly against the left wing of the barbarians, being eager to attack them in flank while still in a state of disorder, before their cavalry could be deployed.
CHAPTER XVII.
Defeat of Porus.
Meantime the Indians had collected their cavalry from all parts, and were riding along, advancing out of their position to meet Alexander's charge. Coenus also appeared with his men in their rear, according to his instructions. The Indians, observing this, were compelled to make the line of their cavalry face both ways[2]; the largest and best part against Alexander, while the rest wheeled round against Coenus and his forces. This therefore at once threw the ranks as well as the decisions of the Indians
