On hearing this, Raymond suddenly quitted Tizzano, passed the lofty range of Monte Albano, and by night-fall had joined his detachment and invested the fortified bridge and fortress of Cappiano. This was an unexpected stroke for the Lucchese general, who believed himself safe in that quarter, and would appear to have doubted the possibility of so sudden a passage of the Gusciana by any soldiers; so that this operation increased the fame of Cardona, the confidence of the league, and the spirit of the Florentines. His frontier line being thus broken, Castruccio immediately quitted Pistoia, and entering the Val di Nievole threw his army in position amongst the hills above Vivinaia, which he endeavoured to strengthen while he pressed for the co-operation of all his friends; Pisa disregarded this summons in consequence of his recent treachery; but from Lucca, Arezzo, La Marca, Romagna, and the Maremma he assembled thirteen hundred men-at-arms and a numerous infantry, with which he reinforced all his positions from Vivinaia to Porcari, strengthening the latter with additional works and troops to secure his communications with Lucca; and finally cut a trench from the hills to the marsh of Bientina which was guarded with the utmost solicitude. The bridge of Cappiano was taken by Cardona on the 13th of July; the town itself next fell; two days after, Montefalcone was summoned and reduced in eight days, and thus the whole line of the Gusciana was cleared of the enemy. This rapid success brought numerous reinforcements from Siena, Perugia, Bologna, Agubbio, Grosseto, Montepulciano, Chiusi, Colle, San Gimignano, Volterra, San Miniato, Faenza, Imola, Count Battifolle, and the exiles from Lucca and Pistoia; all eager to assist in overwhelming this formidable chieftain; so that the army had already swelled to 3454 men-at-arms and a proportionate number of infantry. With this immense force Cardona advanced, and on the 3rd of August invested the strong fortress of Altopascio, which crowns a hill rising from the marshes north of the Bientina Lake; the place, although impregnable to an assault, was so damaged by the battering engines and so poisoned by heat, sickness, and the horrid stench of filthy matter which it was then usual to cast into besieged towns, that on hearing of the discomfiture of a Lucchese detachment sent from Pistoia to make a diversion towards Florence it immediately surrendered.