The first military action in which intervened was the Conquest of Tunis (1535), a great triumph of the imperial troops over the Ottoman Turks who snatched the plaza in North Africa. Following the emperor on his tour of Europe, the young Álvarez de Toledo passed through Rome, where king Carlos I defied Francis I of France, which triggered another war with that country (the third of the reign of the emperor), between the years 1536-1538. Following the signing of peace, Álvarez de Toledo returned to Spain and later went to Ghent, in Flanders. Once participated in the expedition to Algiers, important Turkish square in North Africa, campaign which ended in failure due to bad weather (1541).