When a Good Error is Seen to Be Made by the Enemy, it ought to Be Believed that it is Done Under Deceit

Fulvius, having been left as Legate in the army that the Romans had in Tuscany, while the Consul had gone to Rome for some ceremonies, the Tuscans to see if they could trap him, placed an ambush near the Roman camp; and they sent some soldiers dressed as shepherds with a large flock, and had them come in the sight of the Roman army, and thus dressed approached the entrenchments of the camp: whence the legate wondering at this presumption of theirs, and as it did not appear reasonable, took means to discover the deceit, and thus defeated the designs of the Tuscans. Here it can be conveniently noted that a Captain of armies ought not to trust in an error which he sees done by the enemy, as it always is done under deception, for it is unreasonable that men are so incautious. But often, the desire for victory blinds the minds of men who do not see anything else other then that which favors them. After the Gauls had overcome the Romans on the Allia, they came to Rome, and finding the gates open and unguarded, remained all t............