Of the effect produced in battle by strange and unexpected sights or sounds.
That the disorder occasioned by strange and unexpected sights or sounds may have momentous consequences in combat, might be shown by many instances, but by none better than by what befell in the battle fought between the Romans and the Volscians, when Quintius, the Roman general, seeing one wing of his army begin to waver, shouted aloud to his men to stand firm, for the other wing was already victorious. Which words of his giving confidence to his own troops and striking the enemy with dismay won him the battle. But if a cry like this, produce great effect on a well disciplined army, far greater must be its effect on one which is ill disciplined and disorderly. For by such a wind the whole mass will be moved, as I shall show by a well-known instance happening in our own times.
A few years ago the city of Perugia was split into the two factions of the Baglioni and the Oddi, the former holding the government, the latter being in exile. The Oddeschi, however, with the help of friends, having got together an armed force which they lodged in villages of their own near Perugia, obtained, by the favour of some of their party, an entrance into the city by night, and moving forward without discovery, came as far as the public square. And as all the streets of Perugia are barred with chains drawn across them at their corners, the Oddeschi had in front of them a man who carried an iron hammer wherewith to break the fastenings of the chains so that horsemen might pass. When the only chain remaining unbroken was that which closed the public square, the alarm having now been given, the hammerman was so impeded by the crowd pressing behind him that he could not raise his arm to strike freely. Whereupon, to get more room for his work, he called aloud to the others