In 1314, internal discord allowed Uguccione della Faggiuola to make himself lord of Pisa and then to conquer Lucca. Revolts in the two cities quickly ended Uguccione's regime. In Lucca, the citizens gave the lordship over their Republic to the ghibelline Castruccio Castracani, member of the House of Antelminelli and leader of great political and military capacity. His reign represented the highest peak of the Republic's power, whose territories included the Garfagnana to the north, the coast from the city of Carrara to Pisa to the west, the city of Pistoia to the east (under the codomain of Lucca and Florence), and south the Valdarno constantly disputed with the Republic of Florence. Castracani also succeeded in making Lucca the only antagonist to the expansion of Republic of Florence leading to the victory in the Battle of Altopascio, in 1325, where he defeated the powerful Florentine army chasing them up to the walls of Florence.