When the agreement between the duke and the count was concluded, Niccolo was in Romagna, and in pursuance of his instructions from the duke, affected to be highly incensed, that a connection had been established between him and the count, his inveterate enemy. He therefore withdrew himself and his forces to Camurata, a place between Furli and Ravenna, which he fortified, as if designing to remain there some time, or till a new enterprise should present itself. The report of his resentment being diffused, Niccolo gave the pope to understand how much the duke was under obligation to him, and how ungrateful he proved; and he was persuaded that, possessing nearly all the arms of Italy, under the two principal generals, he could render himself sole ruler: but if his holiness pleased, of the two principal generals whom he fancied he possessed, one would become his enemy, and the other be rendered useless; for, if money were provided him, and he were kept in pay, he would attack the territories held of the church by the count, who being compelled to look to his own interests, could not subserve the ambition of Filippo. The pope giving entire credence to this representation, on account of its apparent reasonableness, sent Niccolo five thousand ducats and loaded him with promises of states for himself and his children. And though many informed him of the deception, he could not give credit to them, nor would he endure the conversation of any who seemed to doubt the integrity of Niccolo's professions. The city of Ravenna was held for the church by Ostasio da Polenta. Niccolo finding further delay would be detrimental, since his son Francesco had, to the pope's great dishonor, pillaged Spoleto, determined to attack Ravenna, either because he judged the enterprise easy, or because he had a secret understanding with Ostasio, for in a few days after the attack, the place capitulated. He then took Bologna, Imola, and Furli; and (what is worthy of remark) of twenty fortresses held in that country for the pope, not one escaped falling into his hands. Not satisfied with these injuries inflicted on the pontiff, he resolved to banter him by his words as well as ridicule him by his deeds, and wrote, that he had only done as his holiness deserved, for having unblushingly attempted to divide two such attached friends as the duke and himself, and for having dispersed over Italy letters intimating that he had quitted the duke to take part with the Venetians. Having taken possession of Romagna, Niccolo left it under the charge of his son, Francesco, and with the greater part of his troops, went into Lombardy, where joining the remainder of the duke's forces, he attacked the country about Brescia, and having soon completely conquered it, besieged the city itself.