few days, until he gets his forces together, this, though not necessary, may sometimes be for his advantage. But for a prince who is without a strong army to have fortresses erected throughout his territories, or upon his frontier, is either useless or hurtful, since they may readily be lost and then turned against him; or, supposing them so strong that the enemy is unable to take them by assault, he may leave them behind, and so render them wholly unprofitable. For a brave army, unless stoutly met, enters an enemy’s country without regard to the towns or fortified places it leaves in its rear, as we read of happening in ancient times, and have seen done by Francesco Maria della Rovere, who no long while ago, when he marched against Urbino, made little of leaving ten hostile cities behind him.
The prince, therefore, who can bring together a strong army can do without building fortresses, while he who has not a strong army ought not to build them, but should carefully strengthen the city wherein he dwells, and keep it well stored with supplies, and its inhabitants well affected, so that he may resist attack till an accord be agreed on, or he be relieved by foreign aid. All other expedients are costly in time of peace, and in war useless.
Whoever carefully weighs all that has now been said will perceive, that the Romans, as they were most prudent in all their other methods, so also showed their wisdom in the measures they took with the men of Latium and Privernum, when, without ever thinking of fortresses, they sought security in bolder and more sagacious courses.