The First Italian War marks the beginning of the French intervention in Italy as a decisive example of conquest without consolidation. France entered a fragmented political landscape through an alliance with Venice, gained access where its previous conduct had left it without friends, and initially appeared to be restoring French authority. Yet the campaign’s larger significance lies in the reversal that followed: military entry produced influence, but political miscalculation converted that influence into dependence, rival expansion, and eventual ruin.

Causes and Political Background

The immediate opening for France came from the ambition of Venice. The Venetians hoped that Louis XII of France would help them obtain half of Lombardy, and Louis accepted their friendship because he desired a foothold in Italy but had inherited a situation in which, after the conduct of Charles VIII of France, every door was effectively closed to him. The alliance therefore joined two unequal calculations: Venice sought territorial profit, while France sought an entrance into Italy. The initial arrangement was not condemned in itself; the failure lay in what Louis did after the entrance had been secured.

The wider setting was an Italy divided among the Church and republics whose citizens were unfamiliar with arms and had consequently turned to foreigners for military service. The mercenary tradition associated with Alberigo of Conio in Romagna had produced commanders including Braccio and Francesco Sforza, but the system they represented had left Italy vulnerable. Its armies favored cavalry, avoided night attacks, released prisoners without ransom, and rejected the hardships of fortification and winter campaigning. The result was not merely inefficient warfare but national weakness: Italy had been overrun by Charles, plundered by Louis, wasted by Ferdinand II of Aragon, and insulted by Switzerland.

French Advance and the First Reversal

The recovery of Lombardy briefly restored the reputation that Charles VIII of France had lost. Genoa submitted, Florence reached terms, and the Marquis of Mantua, the Duke of Ferrara, the Bentivogli, the Countess of Forlì, the Lords of Faenza, Pesaro, Rimini, Camerino, and Piombino, and the citizens of Lucca, Pisa, and Siena all offered friendship. Venice, having made the French King master of two-thirds of Italy in exchange for a few towns in Lombardy, now had reason to regret the scale of the bargain.

The apparent success contained the conditions for a more secure settlement. Louis possessed numerous weaker neighbors who were fearful and therefore compelled to attach themselves to him, including powers connected with the Church and Venice. With their assistance he could have protected Lombardy against another powerful state. Instead, almost immediately after reaching Milan, he helped Pope Alexander VI occupy Romagna. This strengthened the Church with substantial temporal power while alienating the very friends who had placed themselves under French protection.

The first loss of Milan showed how quickly a conquest could unravel when local expectations were disappointed. The people who had opened the gates to the French King had expected future benefits; when those hopes were frustrated, they could not endure the insolence of the new ruler. Ludovico Sforza was then able, with his own forces, to recover Milan from France. The rebellion also demonstrated a general mechanism of occupation: once a state has rebelled and been subdued, a ruler can use punishment, trials, and measures against suspected conspirators to reinforce the weak points of his authority. A second recovery therefore required far more than a frontier alarm. It required the world to be ranged against France and its armies to be destroyed and driven out of Italy.

Strategic Errors and Rival Empowerment

The French failure is analyzed as a chain of connected errors rather than as a single battlefield defeat. Louis destroyed weaker states instead of protecting them, strengthened a prince already strong by enlarging the Church’s territorial power, brought a formidable foreign power into Italy, failed to reside in the conquered country, and sent no colonies. These mistakes weakened the network of local support on which French authority depended and created rivals capable of using Italian discontent against France.

Louis also permitted the partition of territories that made his position still more precarious. He ceded Romagna to Pope Alexander VI and Naples to Spain, and later consented to the ruin of Venice. The first partition of Lombardy with Venice could be excused as the price of gaining an entrance into Italy; the partition of Naples could not be justified by the same necessity. Once the Church and Spain had been strengthened, destroying Venice removed a power that might otherwise have prevented another state from attacking Lombardy. France thus eliminated a possible barrier against its enemies after having already created more dangerous enemies of its own.

The decision to yield territory in order to avoid war is rejected as a false economy. War, in this analysis, cannot be escaped by postponement; delay merely gives the other side the advantage. Louis’s obligations to Pope Alexander VI, including promises connected with the dissolution of his marriage and the elevation of Georges d’Amboise to the cardinalate, did not excuse the strategic result. A ruler who allows immediate arrangements to obstruct larger designs may preserve temporary peace while surrendering the conditions of lasting security.

Military Dependence and Foreign Intervention

The war also exposes the danger of relying on forces that do not belong wholly to the prince. Cesare Borgia entered Romagna with French auxiliary troops and used them to take Imola and Forlì. Distrusting those forces, he next hired mercenaries from the Orsini and Vitelli. When these troops proved fickle, false, and treacherous, he dismissed them and turned to forces of his own raising. His reputation rose as his dependence on foreign commanders diminished, and he was never so highly regarded as when everyone understood that he was master of his own army.

This contrast supplies a military explanation for the broader instability of the First Italian War. Auxiliary troops are united and controlled by their own officers, making them more dangerous than mercenaries: their victory may immediately place the prince at the mercy of those who supplied the force. Mercenaries are vulnerable through cowardice and inactivity; auxiliaries through their strength. The prudent alternative is a ruler’s own army, for a victory won through foreign aid is not treated as a true victory.

The Roman example offers the opposing model. When Rome acquired territories, it planted colonies, conciliated weaker powers without allowing them to become too strong, humbled major powers, and prevented any formidable stranger from gaining influence. In Greece, Rome employed the Achaeans and Aetolians, humbled the Macedonian monarchy, and drove Antiochus III the Great out. It refused both to let Philip V of Macedon escape humiliation through persuasion and to allow Antiochus to exercise authority in the province. These were not isolated acts of aggression but preventive measures intended to keep future threats distant and manageable.

Consequences and Political Significance

The decisive lesson drawn from the war is that military acquisition and political retention are different achievements. A prince who conquers a country with different laws, language, and customs must, according to the argument, reside there personally, protect weaker neighbors, weaken stronger ones, and prevent an equally powerful outsider from entering. Discontented inhabitants will otherwise invite a foreign power through ambition or fear, while weaker states will naturally join the newcomer against the power that has dominated them. France failed to convert its entry into a stable order because it did not manage these relationships before they hardened into opposition.

The comparison with Alexander the Great reinforces the point. Alexander the Great conquered Asia rapidly, and his successors retained the kingdom after his death because Darius III had ruled a centralized state resembling the Turk’s monarchy: once Darius was utterly defeated and his family removed, no independent barons remained with sufficient authority to organize rebellion. The difficulty of holding a conquest therefore depended less on the conqueror’s abstract merit than on the structure of the conquered state. By contrast, kingdoms composed of hereditary lords and small principalities repeatedly resisted Roman rule until the memory of their former rulers had been erased by long continuance and Roman authority.

The First Italian War consequently becomes a case study in political foresight. The Romans made war against Philip V of Macedon and Antiochus III the Great in Greece rather than wait until those powers could threaten Italy. Their policy assumed that disorders were easiest to cure while still remote and hardest to cure once visible to everyone. France followed the opposite course: it avoided immediate conflicts by empowering rivals, surrendering territory, and accepting arrangements that deferred rather than removed danger.

The final maxim is therefore broader than the fate of Milan. A power that raises another to greatness eventually creates the force that can destroy it, whether through political skill or military assistance, because the newly empowered rival must distrust the hand that made it strong. France’s intervention opened Italy to French influence, but its alliances and concessions enlarged the Church and Spain, while its treatment of Venice removed a counterweight. The war’s enduring significance lies in that reversal: the conqueror became the architect of the power that displaced it.