Despite his efforts the Spanish Papal army was defeated, and he was captured by the French, who were under the command of Gaston de Foix, at Ravenna on 11 April 1512). Ferdinand II of Aragon refused to ransom him, and he eventually entered the service of Francis I of France. Navarro went on to accompany the French armies in their campaign against Milan (1515–1516), and he fought alongside King Francis against the Swiss at the battle of Marignano (September 13–14, 1515). Continuing in French service, he fought at the Battle of Bicocca (April 27, 1522) and was taken prisoner when the Spanish captured Genoa early the following year (1523). Released after the Treaty of Madrid (January 14, 1526), he returned to French service, again being taken prisoner while serving the French expedition in Italy (1527). He died, aged around 68, in the prison of Castel Nuovo at Naples at the end of August 1528, possibly smothered with a pillow.