Caesar's ambition was only fed by victories: scarcely was he master of Faenza before, excited by the Mariscotti, old enemies of the Bentivoglio family, he cast his eyes upon Bologna; but Gian di Bentivoglio, whose ancestors had possessed this town from time immemorial, had not only made all preparations necessary for a long resistance, but he had also put himself under the protection of France; so, scarcely had he learned that Caesar was crossing the frontier of the Bolognese territory with his army, than he sent a courier to Louis XII to claim the fulfilment of his promise.Louis kept it with his accustomed good faith; and when Caesar arrived before Bologna, he received an intimation from the King of France that he was not to enter on any undertaking against his ally Bentivoglio; Caesar, not being the man to have his plans upset for nothing, made conditions for his retreat, to which Bentivoglio consented, only too happy to be quit of him at this price: the conditions were the cession of Castello Bolognese, a fortress between Imola and Faenza, the payment of a tribute of 9000 ducats, and the keeping for his service of a hundred men-at-arms and two thousand infantry.In exchange for these favours, Caesar confided to Bentivoglio that his visit had been due to the counsels of the Mariscotti; then, reinforced by his new ally's contingent, he took the road for Tuscany.But he was scarcely out of sight when Bentivoglio shut the gates of Bologna, and commanded his son Hermes to assassinate with his own hand Agamemnon Mariscotti, the head of the family, and ordered the massacre of four-and-thirty of his near relatives, brothers, sons, daughters, and nephews, and two hundred other of his kindred and friends.The butchery was carried out by the noblest youths of Bologna; whom Bentivoglio forced to bathe their hands in this blood, so that he might attach them to himself through their fear of reprisals.
Caesar's plans with regard to Florence were now no longer a mystery:
since the month of January he had sent to Pisa ten or twelve hundred men under the Command of Regniero della Sassetta and Piero di Gamba Corti, and as soon as the conquest of the Romagna was complete, he had further despatched Oliverotto di Fermo with new detachments.His own army he had reinforced, as we have seen, by a hundred men-at-arms and two thousand infantry; he had just been joined by Vitellozzo Vitelli, lord of Citta, di Castello, and by the Orsini, who had brought him another two or three thousand men; so, without counting the troops sent to Pisa, he had under his control seven hundred men-at-arms and five thousand infantry.
Still, in spite of this formidable company, he entered Tuscany declaring that his intentions were only pacific, protesting that he only desired to pass through the territories of the republic on his way to Rome, and offering to pay in ready money for any victual his army might require.But when he had passed the defiles of the mountains and arrived at Barberino, feeling that the town was in his power and nothing could now hinder his approach, he began to put a price on the friendship he had at first offered freely, and to impose his own conditions instead of accepting those of others.These were that Piero dei Medici, kinsman and ally of the Orsini, should be reinstated in his ancient power; that six Florentine citizens, to be chosen by Vitellozzo, should be put into his hands that they might by their death expiate that of Paolo Vitelli, unjustly executed by the Florentines; that the Signoria should engage to give no aid to the lord of Piombino, whom Caesar intended to dispossess of his estates without delay; and further, that he himself should be taken into the service of the republic, for a pay proportionate to his deserts.But just as Caesar had reached this point in his negotiations with Florence, he received orders from Louis XII to get ready, so soon as he conveniently could, to follow him with his army and help in the conquest of Naples, which he was at last in a position to undertake.
Caesar dared not break his word to so powerful an ally; he therefore replied that he was at the king's orders, and as the Florentines were not aware that he was quitting them on compulsion, he sold his retreat for the sum of 36,000 ducats per annum, in exchange for which sum he was to hold three hundred men-at-arms always in readiness to go to the aid of the republic at her earliest call and in any circumstances of need.
But, hurried as he was, Caesar still hoped that he might find time to conquer the territory of Piombino as he went by, and take the capital by a single vigorous stroke; so he made his entry into the lands of Jacopo IV of Appiano.The latter, he found, however, had been beforehand with him, and, to rob him of all resource, had laid waste his own country, burned his fodder, felled his trees, torn down his vines, and destroyed a few fountains that produced salubrious waters.
This did not hinder Caesar from seizing in the space of a few days Severeto, Scarlino, the isle of Elba, and La Pianosa; but he was obliged to stop short at the castle, which opposed a serious resistance.As Louis XII's army was continuing its way towards Rome, and he received a fresh order to join it, he took his departure the next day, leaving behind him, Vitellozzo and Gian Paolo Bagliani to prosecute the siege in his absence.