Battle of Montaperti

Battle of Montaperti
Part of the conflict between the Guelphs and Ghibellines
Date4 September 1260
Location43°18′55″N 11°26′22″E / 43.31528°N 11.43944°E / 43.31528; 11.43944
Result Decisive Ghibelline victory
Belligerents
Ghibellines:
Siena
Manfred of Sicily Pisa Terni Florentine exiles
Guelphs:
Florence
Lucca Bologna Prato Orvieto San Gimignano San Miniato Volterra Colle Val d'Elsa
Commanders and leaders
Provenzano Salvani
Farinata degli Uberti
Giordano d'Anglano
Ildebrandino Aldobrandeschi

Jacopo del Naca 
Niccolò Garzoni 
Strength
17,000 troops 33,000 troops
Casualties and losses
600 killed
400 wounded
2,500 killed
1,500 captured

The Battle of Montaperti was fought on 4 September 1260 between Florence and Siena in Tuscany as part of the conflict between the Guelphs and Ghibellines. The Florentines were routed. It was the bloodiest battle fought in medieval Italy, with more than 10,000 fatalities. An act of treachery during the battle is recorded by Dante Alighieri in the Inferno section of the Divine Comedy.