The Battle of Desio was fought on 21 January 1277 between the Della Torre and Visconti families for the control of Milan and its countryside. The battlefield is located near the modern Desio, a commune outside the city in Lombardy, Northern Italy.
Although generally considered one of the numerous minor battles fought in the 13th century in Italy during the Wars of the Guelphs and Ghibellines, it was in fact the conclusion of a long inner struggle for the possession of Milan, leading to the transformation of the former democratic regime into an aristocratic signoria. The Visconti victory granted them the rule over Milan, which lasted until the 15th century.
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