The Battle of Montecatini was fought in the Val di Nievole on August 29, 1315 between the city of Pisa

Pisa

Pisa is a city in Tuscany, Central Italy, on the right bank of the mouth of the River Arno on the Tyrrhenian Sea. It is the capital city of the Province of Pisa...

, and the forces of both Naples

Naples

Naples is a city in Southern Italy, situated on the country's west coast by the Gulf of Naples. Lying between two notable volcanic regions, Mount Vesuvius and the Phlegraean Fields, it is the capital of the region of Campania and of the province of Naples...

 and Florence

Florence

Florence is the capital city of the Italian region of Tuscany and of the province of Florence. It is the most populous city in Tuscany, with approximately 370,000 inhabitants, expanding to over 1.5 million in the metropolitan area....

. The army of Pisa, commanded by Uguccione della Faggiuola

Uguccione della Faggiuola

Uguccione della Faggiuola was an Italian condottiero, and chief magistrate of Pisa, Lucca and Forlì .-Biography:...

, won a decisive victory despite being outnumbered. The Neapolitan forces, made up of nearly 60,000 men, were commanded by Philip I of Taranto

Philip I of Taranto

Philip I of Taranto : of the Angevin house, was titular Emperor of Constantinople , despot of Epirus, King of Albania, Prince of Achaea and Taranto, and Lord of Durazzo....

. While he survived the battle, his eldest son Charles of Taranto and his brother Peter, Count of Eboli and Gravina

Peter Tempesta

Peter , called Tempesta , was the Count of Eboli from 1306. He was the eighth son of Charles II of Naples and Mary of Hungary . His sobriquet came from his stormy temperament.In 1309, he received Nocera and Isernia and exchanged Montescaglioso for Sorrento and Castellammare di Stabia...

, were both killed in the fight. Additional deaths included members of 114 Florentine noble families, as well as Francesco della Faggiuola, son of Uguccione.