The Battle of Alfarrobeira is fought, establishing the House of Braganza as a principal royal family of Portugal.

The Battle of Alfarrobeira took place on 20 May 1449. It was a confrontation between the forces commanded by King Afonso V of Portugal and his uncle Afonso, Duke of Braganza, against the army of the rebellious Peter, Duke of Coimbra. The place was Vialonga, near Lisbon, at the margins of the creek of Alfarrobeira. The result was the clear defeat and death of the Duke of Coimbra and the establishment of the Braganzas as the most powerful House of Portugal.

The Most Serene House of Braganza, also known as the Brigantine dynasty, is a dynasty of emperors, kings, princes, and dukes of Portuguese origin which reigned in Europe and the Americas.