Pisa

Pisa appears in the political geography of Italy as a key objective in the struggle for Tuscany. When Cesare Borgia was already in possession of Perugia and Piombino, he had assumed the protectorship of Pisa and was preparing to move against the city. Its capture was not an isolated conquest: Pisa stood at the opening of a projected sequence in which Lucca and Siena would soon have yielded, partly from jealousy of Florence and partly from fear. Florence would then have faced a desperate position, while Cesare’s control of Tuscany would have greatly enlarged the territory and reputation on which he was building his independent power.

Strategic Position and Political Stakes

Pisa’s importance lay in its capacity to alter the balance among the Tuscan cities. Cesare Borgia’s plan treated the city as a decisive point from which neighboring states could be pressured or isolated. The proposed advance connected possession of Pisa with the submission of Lucca and Siena, and with the weakening of Florence. His objective was therefore not merely to occupy one city, but to create a regional chain of dependencies that would make his authority in central Italy more secure.

The plan also belonged to a wider effort to free Cesare from dependence on the fortunes of others. France no longer seemed an immediate obstacle, because France had been deprived of the Kingdom of Naples by Spain under circumstances that compelled both powers to purchase Cesare’s friendship. With Pisa taken, he expected his position to become strong enough to withstand the rival pressures surrounding him and to support a principality founded on his own resources rather than on the authority of Pope Alexander VI or French arms.

Pisa in Cesare Borgia’s Project

The projected assault occurred during the very year in which Cesare’s wider designs were advancing. He already held Perugia and Piombino and had converted his relationship with Pisa into a protectorship before attempting to make the city fully subject to his power. The text treats this preparation as evidence of deliberate expansion: Pisa was not an accidental target, but the next move in a calculated attempt to make Tuscany the center of Cesare’s dominion.

Had the design succeeded, Cesare would have gained the power and reputation needed to stand alone. The consolidation of Romagna had already given him a territorial foundation, while Pisa promised access to a broader political sphere. Its fall would have intensified pressure on Lucca and Siena and made Florence vulnerable. The city thus functions as a measure of the distance between a promising project and completed supremacy: Cesare had created the conditions for conquest, but his larger Tuscan settlement remained unfinished when Pope Alexander VI died.

Foreign Arms and the Problem of Control

Pisa is also associated with the military weakness of rulers who depend on forces they do not command as their own. The Florentines, lacking soldiers of their own, brought ten thousand French men-at-arms to the siege of Pisa. The example is used to show that auxiliary forces can place a state in greater danger precisely when they appear to offer immediate protection. Such troops may be effective in battle, but their loyalty and strategic interests belong to the power that supplies them.

The danger was not theoretical. Auxiliary troops could ruin the ruler if defeated, while victory could leave him dependent on, or captive to, the army that had secured it. The Florentine use of ten thousand French men-at-arms therefore illustrates the political cost of outsourcing defense: the siege became an occasion of heightened peril rather than a straightforward instrument of security. Pisa’s military significance lies as much in this exposure of dependence as in the city’s value as a territorial prize.

Wider Lessons of the Location

The discussion of Pisa belongs to a comparative account of conquest and retention. Alexander the Great’s conquest of Asia is contrasted with acquisitions that proved difficult to preserve because the conquered territories possessed different political structures. A state’s durability depends not simply on the brilliance of its conqueror, but on the institutions, loyalties, and forms of rule found in the acquired country. Pisa, embedded in the factional and competitive politics of Italy, represents the kind of city whose possession required more than a single successful operation.

The city also falls within the book’s larger emphasis on anticipating political disorders before they become impossible to remedy. A prudent ruler must identify strategic dangers while they remain remote, prevent stronger foreign powers from gaining an entrance, and prepare for conflicts before the opposing side has gained strength. Cesare’s intended seizure of Pisa exemplifies proactive territorial calculation, while the Florentine siege demonstrates the opposite vulnerability: without national troops, even an important military undertaking can leave the state exposed to the very powers summoned to assist it.

Pisa therefore carries a double significance. It is a gateway in Cesare Borgia’s unrealized attempt to dominate Tuscany, a city whose capture might have transformed the regional balance and strengthened his claim to self-sufficient rule. At the same time, its siege provides a warning that territorial ambition cannot be separated from the means by which power is exercised. The city can be approached as a prize, a pressure point, or a test of military independence; in each role, it reveals that conquest becomes durable only when political control and armed power rest on the ruler’s own foundations.