like the first, this betrothal was never to be consummated. in 1315, philip went north in command of neapolitan troops to relieve the florentine guelphs, besieged at montecatini by the pisan ghibellines under uguccione della faggiuola. charles of taranto and philip's younger brother, peter, count of gravina accompanied him. despite initial successes, philip fell ill with fever, and was crushingly defeated by uguccione at the battle of montecatini. charles was killed on the field, and his uncle lost; the ailing philip escaped.