instead from Borsano, or from the opposite side, which forced the municipal troops to resist around the carroccio with the escape road blocked by the Olona. Considering the evolution of the clash, this could mean that the crucial phases in defence of the carroccio had been fought on the territory of the San Martino contrada (more precisely, near the 15th-century church of the same name, which in fact dominates a slope that descends towards the Olona) or of the Legnanese quarter of "Costa di San Giorgio", since in another part of the neighbouring areas it is not possible to identify another depression with the characteristics suitable for its defence. Considering the last hypothesis, the final clash could also have taken place on part of the territory now belonging to the contrade of Sant'Ambrogio and San Magno (between the quartier of "Costa di San Giorgio" and the Olona, a steep slope was later included in the Castello park) and to the municipality of San Giorgio su Legnano. 13th century The carroccio was afterwards adopted by other cities and first appears, after Legnano, on a Florentine battlefield in 1228. The Florentine carroccio was usually followed by a smaller cart bearing the "martinella", a bell to ring out military signals. When war was regarded as likely, the "martinell" was attached to the door of the Church of Santa Maria in the Mercato Nuovo in Florence and rung to warn both citizens and enemies. In times of peace, the carroccio was in the keeping of a great family which had distinguished itself by signal services to the republic. The Florentine carroccio was captured by the Ghibelline forces of Castruccio Castracani in the 1325 Battle of Altopascio, after which it was displayed by the victors in a triumph held in the streets of Lucca. The carro della guerra of Milan was described in detail in 1288 by Bonvesin de la Riva in his book on the "Marvels of Milan". Wrapped in scarlet cloth and drawn by three yoke of oxen that were caparisoned in the white with the red crosses of Saint George, the city's patron, it carried a crucifix so massive it took four men to put it in place, like a ship's mast. The carroccio of the Lombard League was captured by the imperials in 1237 during the battle of Cortenuova, donated to Pope Gregory IX by the emperor Frederick II, Holy Roman