Misfortune certainly had not broken the spirit of Pisa. And so it is not surprising that, though she dared scarcely fly her flag on the seas, on land she thought to hold her own. No doubt this hope was strengthened by the advent in 1312 of Henry VII of Luxembourg. With him on her side she dreamed of the domination of Tuscany. But it was not to be. She found money and arms in his cause and her own. She opened a new war with the Guelph League; she suspended her own Government and made him lord of Pisa. He remained with her two months, and then in 1313 he died at Buonconvento. They buried him sadly in the Duomo. The two million florins she had expended were lost for ever. Frederick of Sicily, Henry's ally, though he came to Pisa, refused the proferred lordship, as did Henry of Savoy; and at last Pisa placed herself under the Imperial Vicar of Genoa, for that city also had been delivered by her nobles into the hands of Henry VII. Uguccione della Faggiuola, the Imperial Vicar of Genoa, remained, as Imperial legate, Podesta, Captain of the People, and Elector, bringing with him one thousand German horse. The rest of the army of Henry returned over the Alps. Pisa thought herself on the verge of ruin; she must make terms with her foes. This being done, there appeared to be no further need for Uguccione, whose German troops were expensive, and whose presence did but anger the Guelphs. Uguccione was a man of enormous strength, brave, too, and resolute, swift to decide an issue, wise in council, but a barbarian. What had he to do with peace. His business was war, as he very soon let the Pisans know. Nor were they slow to take him at his word. Pisa was never beaten. Uguccione marched through the streets with the living eagles of the Empire borne before him. Before long he had deprived the Guelphs of power, and was practically tyrant of Pisa. Everything now seemed to depend on victory. Lucca scarcely ten miles away, Guelph by tradition and hatred of Pisa, was in an uproar. Uguccione saw his chance and took it; he flung himself on the city and delivered it up to its own factions while the Pisans sacked it. Nor did they spare the place. The spoil was enormous; among the rest, a large sum belonging to the Pope fell into their hands. Florence and her allies sprang to arms. Uguccione took up the challenge, burnt the lands of Pistoja and San Miniato al Tedesco, ravaged the vineyards of Volterra, seized the fortresses of Val di Nievole, and at last besieged Montecatini. It was now that the Ghibellines of Lucca with Castruccio Castracani joined Uguccione. They met the army of Florence at Montecatini. Machiavelli states that Uguccione fell ill, and had no part in the battle, which was won by Castruccio. Villari, however, gives the glory to Uguccione.