Meanwhile the first entrance of Charles VIII. into Italy had left the seeds of discord and disaster in Tuscany. Pisa was at that time under the rule of Florence, but repining at its servitude. When Charles entered Pisa, its citizens implored him to restore to them their independence: he promised to comply; and though afterwards he made treaties to a contrary effect with Florence, the Pisans profited by his secret inclination in their favour, and the sympathy afforded them by the officers and men that composed his army, to shut their gates against their Florentine governors, and to assert their liberty. From this time it became the ardent desire of Florence to subdue the rebel city; they exhausted all their resources in prosecution of this favourite object. Each year they attacked the walls, and destroyed the crops, of the unfortunate but resolute Pisans; and, in each treaty they made with France, the chief article was a promise of aid in this desired conquest. [Sidenote: 1500. Ætat. 31.] At one time they formed the siege of Pisa, and solicited Louis XII. to supply them with troops and artillery. That politic sovereign, who wished to strengthen himself in Italy, sent them double the force they required. These auxiliaries, composed of Swiss and Gascons, pillaged both friends and foes, quarrelled with the Florentine commissaries, came to a secret understanding with Pisa, and, finally, on a pretence of a delay of pay, raised the siege. The king of France accused Florence of being the cause of this affront sustained by his arms; and, to appease him, and to obtain, if possible, further assistance, the republic deputed Francesco della Gaza, and Machiavelli, as envoys to the French court.