Saint George Saint George (white with red cross) was also carried by the Portuguese troops and hoisted in the fortresses, during the 15th century. "Portugal and Saint George" became the battle cry of the Portuguese troops, being still today the battle cry of the Portuguese Army, with simply "Saint George" being the battle cry of the Portuguese Navy. In Spain, Saint George is the patron of Aragon and Catalonia. These two autonomous communities were in the past two of the most important territories belonging to the Crown of Aragon. Saint George () is the patron of Aragon, one of the autonomous communities
Portugal son-in-law of Ferdinand I of Portugal, claimed the throne of Portugal. A faction of petty noblemen and commoners, led by John of Aviz (later King John I of Portugal) and commanded by General Nuno Álvares Pereira defeated the Castilians in the Battle of Aljubarrota. With this battle, the House of Aviz became the ruling house of Portugal. Portugal spearheaded European exploration of the world and the Age of Discovery. Prince Henry the Navigator, son of King João I, became the main sponsor and patron of this endeavour. During this period, Portugal explored the Atlantic Ocean, discovering several Atlantic archipelagos like