Thus it came about that the mercenaries in the army of Machanidas fought with such fury and violence, that even the Illyrians and men with body armour, who formed the reserve supporting the mercenaries of the Achaean army, were unable to withstand their assault; but were all driven from their position, and fled in confusion towards the city of Mantinea, which was about seven stades distant. And now there occurred an undoubted instance of what some doubt, namely, that the issues in war are for the most part decided by the skill or want of skill of the commanders. For though perhaps it is a great thing to be able to follow up a first success properly, it is a greater thing still that, when the first step has proved a failure, a man should retain his presence of mind, keep a good look-out for any error of judgment on the part of the victors, and avail himself of their mistakes. At any rate one often sees the side, which imagines itself to have obtained a clear victory, ultimately lose the day; while those who seemed at first to have failed recover themselves by presence of mind, and ultimately win an unexpected victory. Both happened on this occasion to the respective leaders. The whole of the Achaean mercenaries having been driven from their ground, and their left wing having been thoroughly broken up, Machanidas abandoned his original plan of winning the day by outflanking the enemy with some of his forces and charging their front with others, and did neither; but, quite losing his head, rushed forward heedlessly with all his mercenaries in pursuit of the fugitives, as though the panic was not in itself sufficient to drive those who had once given way up to the town gates.