Spitamenes Driven into the Desert. But Aristobulus says the greater part of this army was destroyed by an ambuscade, the Scythians having hidden themselves in a park and fallen upon the Macedonians from their place of concealment, when Pharnuches was in the very act of retiring from the command in favour of the Macedonians who had been sent with him, on the ground of his not being skilled in military affairs, and of his having been sent by Alexander rather to win the favour of the barbarians than to take the supreme command in battles. He also alleged that the Macedonian215 officers present were the king’s Companions. But Andromachus, Menedemus, and Caranus declined to accept the chief command, partly because it did not seem right to make any alteration on their own responsibility contrary to Alexander’s instructions to them, and partly because in the very crisis of danger, they were unwilling, if they met with any defeat, not only individually to take a share of the blame, but also collectively to exercise the command unsuccessfully. In this confusion and disorder the barbarians fell upon them, and cut them all off, so that not more than forty horsemen and 300 foot preserved their lives.523 When the report of this reached Alexander, he was chagrined at the loss of his soldiers, and resolved to march with all speed against Spitamenes and his barbarian adherents. He therefore took half of the Companion cavalry, all the shield-bearing guards, the archers, the Agrianians, and the lightest men ............