When the elephants, however, became quite exhausted, and their attacks were no longer made with vigour, they fell back like ships backing water, and merely kept trumpeting as they retreated with their faces to the enemy. Then did Alexander surround with his cavalry the whole of the enemy’s line, and signal that the infantry, with their shields linked together so as to give the utmost compactness to their ranks, should advance in phalanx. By this means the cavalry of the Indians was, with a few exceptions, cut to pieces in the action. Such also was the fate of the infantry, since the Macedonians were now pressing upon them from every side. Upon this all turned to flight wherever a gap could be found in the cordon of Alexander’s cavalry. _Chapter XVIII.—Sequel of the battle and surrender of Pôros_ Meanwhile Krateros and all the other officers of Alexander’s army, who had been left behind on the opposite bank of the Hydaspês, crossed the river when they perceived that Alexander was winning a splendid victory. These men, being fresh, were employed in the pursuit, instead of Alexander’s exhausted troops, and they made no less a slaughter of the Indians in the retreat than had been made in the engagement. The loss of the Indians in killed fell little short of 20,000 infantry and 3000 cavalry, and all their chariots were broken to pieces.[108] Two sons of Pôros fell in the battle, and also Spitakês,[109] the chief of the Indians of that district. The drivers of the elephants and of the chariots were also slain and the cavalry officers and the generals in the army of Pôros all....[110] The elephants, moreover, that escaped destruction in the field were all captured. On Alexander’s side there fell about 80 of the 6000 infantry who had taken part in the first attack, 10 of the horse archers who first began the action, 20 of the companion cavalry, and 200 of the other cavalry.[111]