Upon the return of the spring the commissaries halted with their whole force, consisting of five thousand horse and two thousand foot, at the Spedaletto. The king approached with his army, amounting to fifteen thousand men, within three miles of Campiglia, but when it was expected he would attack the place he fell upon Piombino, hoping, as it was insufficiently provided, to take it with very little trouble, and thus acquire a very important position, the loss of which would be severely felt by the Florentines; for from it he would be able to exhaust them with a long war, obtain his own provision by sea, and harass the whole territory of Pisa. They were greatly alarmed at this attack, and, considering that if they could remain with their army among the woods of Campiglia, the king would be compelled to retire either in defeat or disgrace. With this view they equipped four galleys at Livorno, and having succeeded in throwing three hundred infantry into Piombino, took up their own position at the Caldane, a place where it would be difficult to attack them; and they thought it would be dangerous to encamp among the thickets of the plain. The Florentine army depended for provisions on the surrounding places, which, being poor and thinly inhabited, had difficulty in supplying them. Consequently the troops suffered, particularly from want of wine, for none being produced in that vicinity, and unable to procure it from more distant places, it was impossible to obtain a sufficient quantity. But the king, though closely pressed by the Florentines, was well provided except in forage, for he obtained everything else by sea. The Florentines, desirous to supply themselves in the same manner, loaded four vessels with provisions, but, upon their approach, they were attacked by seven of the king's galleys, which took two of them and put the rest to flight. This disaster made them despair of procuring provisions, so that two hundred men of a foraging party, principally for want of wine, deserted to the king, and the rest complained that they could not live without it, in a situation where the heat was so excessive and the water bad. The commissaries therefore determined to quit the place, and endeavor to recover those castles which still remained in the enemy's power; who, on his part, though not suffering from want of provisions, and greatly superior in numbers, found his enterprise a failure, from the ravages made in his army by those diseases which the hot season produces in marshy localities; and which prevailed to such an extent that many died daily, and nearly all were affected. These circumstances occasioned overtures of peace. The king demanded fifty thousand florins, and the possession of Piombino. When the terms were under consideration, many citizens, desirous of peace, would have accepted them, declaring there was no hope of bringing to a favorable conclusion a war which required so much money to carry it on.