 A Venetian army under Bartolomeo d'Alviano attempted to prevent the Spanish and Imperials under Ramón de Cardona from withdrawing from the Veneto, but was defeated and scattered.The Battle of Pampeluna (also spelled Pamplona) occurred on May 20, 1521, between French-backed Navarrese and Spanish troops, during the Spanish conquest of Iberian Navarre and in the context of the Italian War of 1521–26.Most Navarrese towns rose at once against the Spanish, who had invaded Navarre in 1512.