He marched thence to invade the country of the Assakenians, for they were reported to have under arms and ready for battle an army of 20,000 cavalry and more than 30,000 infantry, besides 30 elephants. Krateros had now completed the work of fortifying the city which he had been left to plant with colonists, and rejoined Alexander with the heavy armed troops and the engines which it might be necessary to employ in besieging towns. Alexander himself then proceeded to attack the Assakenians, taking with him the companion cavalry, the horse archers, the brigade of Koinos and Polysperchon, and the thousand Agrianians and the archers. He passed through the country of the Gouraians, where he had to cross the Gouraios,[45] the river named after that country. The passage was difficult on account of the depth and swiftness of the stream, and also because the stones at the bottom were so smooth and round that the men on stepping on them were apt to stumble. When the barbarians saw Alexander approaching they had not the courage to encounter him in the open field with their collective forces, but dispersed to their several cities, which they resolved to defend to the last extremity. _Chapter XXVI.—Siege of Massaga_ Alexander marched first to attack Massaga,[46] which was the greatest city in those parts. When he was now approaching the walls, the barbarians, supported by a body of Indian mercenaries brought from a distance, and no less than 7000 strong, sallied out with a run against the Macedonians when they observed them preparing to encamp. Alexander thus saw that the battle would be fought close to the city, whereas he wished the enemy to be drawn away to a distance from the walls, so that, if they were defeated, as he was certain they would be, they might have less chance of escaping with their lives by a short flight into the city. Alexander therefore ordered the Macedonians to fall back to a little hill which was about seven stadia distant from the place where he had meant to encamp. This gave the enemy fresh courage as they thought the Macedonians had already given way before them, and so they charged them at a running pace and without any observance of order. But when once their arrows began to reach his men, Alexander immediately wheeled round at a signal agreed on and led the phalanx at a running pace to fall upon them. But his horse-lancers and the Agrianians and the archers darted forward, and were the first to come into conflict with the barbarians, while he was leading the phalanx in regular order into action. The Indians were confounded by this unexpected attack, and no sooner found themselves involved in a hand-to-hand encounter than they gave way and fled back to the city. About 200 of them were killed, and the rest were shut up within the walls. Alexander brought up the phalanx against the fortifications, but was wounded in the ankle, though not severely, by an arrow shot from the battlements.