She had begun by answering the Pope's Bull of attainder with the statement that, far from owing the Holy See the tribute which it claimed, the Holy See was actually in her debt, her husband, Count Girolamo Riario, having been a creditor of the Church for the provisions made by him in his office of Captain-General of the Pontifical forces. This subterfuge, however, had not weighed with Alexander, whereupon, having also been frustrated in her attempt upon the life of the Pope's Holiness, she had proceeded to measures of martial resistance. Her children and her treasures she had dispatched to Florence that they might be out of danger, retaining of the former only her son Ottaviano, a young man of some twenty years; but, for all that she kept him near her, it is plain that she did not account him worthy of being entrusted with the defence of his tyranny, for it was she, herself, the daughter of the bellicose race of Sforza, who set about the organizing of this.
Disposing of forces that were entirely inadequate to take the field against the invader, she entrenched herself in her fortress of Forli, provisioning it to withstand a protracted siege and proceeding to fortify it by throwing up outworks and causing all the gates but one to be built up.
Whilst herself engaged upon military measures she sent her son Ottaviano to Imola to exhort the Council to loyalty and the defence of the city. But his mission met with no success. Labouring against him was a mighty factor which in other future cases was to facilitate Cesare's subjection of the Romagna. The Riarii—in common with so many other of the Romagna tyrants—had so abused their rule, so ground the people with taxation, so offended them by violence, and provoked such deep and bitter enmity that in this hour of their need they found themselves deservedly abandoned by their subjects. The latter were become eager to try a change of rulers, in the hope of finding thus an improved condition of things; a worse, they were convinced, would be impossible.
So detested were the Riarii and so abhorred the memory they left behind them in Imola that for years afterwards the name of Cesare Borgia was blessed there as that of a minister of divine justice ("tanquam minister divina justitiae") who had lifted from them the harsh yoke by which they had been oppressed.
And so it came to pass that, before ever Cesare had come in sight of Imola, he was met by several of its gentlemen who came to offer him the town, and he received a letter from the pedagogue Flaminio with assurances that, if it should be at all possible to them, the inhabitants would throw open the gates to him on his approach. And Flaminio proceeded to implore the duke that should he, nevertheless, be constrained to have recourse to arms to win admittance, he should not blame the citizens nor do violence to the city by putting it to pillage, assuring him that he would never have a more faithful, loving city than Imola once this should be in his power.
The duke immediately sent forward Achille Tiberti with a squadron of horse to demand the surrender of the town. And the captain of the garrison of Imola replied that he was ready to capitulate, since that was the will of the people. Three days later—on November 27—Cesare rode in as conqueror.
The example of the town, however, was not followed by the citadel. Under the command of Dionigio di Naldo the latter held out, and, as the duke's army made its entrance into Imola, the castellan signified his resentment by turning his cannon upon the town itself, with such resolute purpose that many houses were set on fire and demolished. This Naldo was one of the best reputed captains of foot of his day, and he had seen much service under the Sforza; but his experience could avail him little here.
On the 28th Cesare opened the attack, training his guns upon the citadel; but it was not until a week later that, having found a weak spot in the walls on the side commanding the town, he opened a breach through which his men were able to force a passage, and so possess themselves of a half-moon. Seeing the enemy practically within his outworks, and being himself severely wounded in the head, Naldo accounted it time to parley. He begged a three-days' armistice, pledging himself to surrender at the end of that time should he not receive reinforcements in the meanwhile; and to this arrangement the duke consented.
The good faith of Naldo has been questioned, and it has been suggested that his asking for three days' grace was no better than a cloak to cover his treacherous sale of the fortress to the besieger. It seems, however, to be no more than one of those lightly-uttered, irresponsible utterances with which the chronicles of the time abound, for Naldo had left his wife and children at Forli in the hands of the Countess, as hostages for his good faith, and this renders improbable the unsupported story of his baseness.
On December 7, no reinforcements having reached him, Naldo made formal surrender of the citadel, safe-conduct having been granted to his garrison.
A week later there arrived at Imola Cesare's cousin, the Cardinal Giovanni Borgia, whom the Pope had constituted legate in Bologna and the Romagna in place of the Cardinal Ascanio Sforza, and whom he had sent to support Cesare's operations with ecclesiastical authority. Cardinal Giovanni, as the Pope's representative, received in the Church of San Domenico the oath of fealty of the city to the Holy See. This was pledged by four representative members of the Council of Thirty; and by that act the conquest and subjection of the town became a fully accomplished fact.
The lesser strongholds of the territory threw up their gates one by one before the advancing enemy, until only Forli remained to be taken. Cesare pushed forward to reduce it.
On his way he passed through Faenza, whose tyrant, Manfredi, deeming himself secure in the protection of Venice and in view of the circumstance that the republic had sent to Rome the arrears of tribute due from his fief, and anxious to conciliate the Pope, received and entertained Cesare very cordially.
At Forli the case of Imola was practically repeated. Notwithstanding that the inhabitants were under the immediate eye of the formidable countess, and although she sent her brother, Alessandro Sforza, to exhort the people and the Council to stand by her, the latter, weary as the rest of the oppressive tyranny of her family, dispatched their representatives to Cesare to offer him the town.
The Countess's valour was of the sort that waxes as the straits become more desperate. Since the town abandoned and betrayed her, she would depend upon her citadel, and by a stubborn resistance make Cesare pay as dearly as possible for the place. To the danger which she seems almost eager to incur for her own part, this strong-minded, comely matron will not subject the son she has kept beside her until now; and so she packs Ottaviano off to Florence and safety. That done, she gives her mutinous subjects a taste of her anger by attempting to seize half a dozen of the principal citizens of Forli. As it happened, not only did this intent miscarry, but it went near being the means of involving her in battle even before the duke's arrival; for the people, getting wind of the affair, took up arms to defend their threatened fellow-citizens.
She consoled herself, however, by seizing the persons of Nicolo Tornielli and Lodovico Ercolani, whom the Council had sent to inform her that their representatives had gone to Cesare with the offer of the town. Further, to vent her rage and signify her humour, she turned her cannon upon the Communal Palace and shattered the tower of it.
Meanwhile Cesare advanced. It was again Tiberti who now rode forward with his horse to demand the surrender of Forli. This was accorded as readily as had been that of Imola, whereupon Cesare came up to take possession in person; but, despite the cordial invitation of the councillors, he refused to enter the gates until he had signed the articles of capitulation.
On December 19, under a deluge of rain, Cesare, in full armour, the banner of the Church borne ahead of him, rode into Forli with his troops. He was housed in the palace of Count Luffo Nomaglie (one of the gentlemen whom Caterina had hoped to capture), and his men were quartered through the town. These foreign soldiers of his seem to have got a little out of hand here at Forli, and they committed a good many abuses, to the dismay and discomfort of the Citizens.