On August 20, 1504, Cesare Borgia took ship for Spain--a prisoner bound for a Spanish dungeon.

Thus, at the early age of twenty-nine, he passed from Italy and the deeds that well might have filled a lifetime.
Conspicuous amid those he left behind him who remained loyal to their duke was Baldassare Scipione, who published throughout Christendom a cartel, wherein he challenged to trial by combat any Spaniard who dared deny that the Duke of Valentinois had been detained a prisoner in Naples in spite of the safe-conduct granted him in the name of Ferdinand and Isabella, "with great shame and infamy to their crown."(1) 1 Quoted by Alvisi, on the authority of a letter of Luigi da Porto, March 16, 1510, in Lettere Storiche.
This challenge was never taken up.
Amongst other loyal ones was that fine soldier of fortune, Taddeo della Volpe, who, in his Florentine prison, refused all offers to enter the service of the Signory until he had learnt that his lord was gone from Italy.
Fracassa and Mirafuente had held Forli until they received guarantees for Cesare's safety (after he had left Ostia to repair to the Spanish camp).

They then rode out, with the honours of war, lance on thigh.
Dionigio di Naldo, that hardy captain of foot, entered the service of Venice; but to the end he wore the device of his dear lord, and imposed the same upon all who served under his banner.
Don Michele da Corella was liberated by Julius II after an interrogatory which can have revealed nothing defamatory to Cesare or his father; as it is unthinkable that a Pope who did all that man could do to ruin the House of Borgia and to befoul its memory, should have preserved silence touching any such revelations as were hoped for when Corella was put to torture.

That most faithful of all Cesare's officers--and sharer of the odium that has been heaped upon Cesare's name--entered the service of the Signory of Florence..