08/14/2026
Battle of Aljubarrota — August 14, 1385
Today, August 14, marks the anniversary of the Battle of Aljubarrota, one of the greatest military victories in Portuguese history. The battle took place in 1385, during the 1383–1385 crisis, when Portugal faced the threat of being incorporated into the Kingdom of Castile.
What is most impressive is the disparity between the two armies: the Portuguese forces numbered approximately 7,000 men, while the Castilian army had around 40,000.
Despite being at a clear numerical disadvantage, the Portuguese—commanded by King John I (D. João I) and Nuno Álvares Pereira—managed to win. The chosen battlefield position, the defensive structures built, and the tactics employed were crucial to the victory. The military genius and mystical nature of Nuno Álvares Pereira prevailed, just as they did in every battle he led—for he was victorious in them all!
The victory was pivotal, as it secured Portugal's independence and consolidated King John I's position on the throne. Later, in thanksgiving for the victory, King John I commissioned the construction of the Batalha Monastery.
A mathematical curiosity: if we compare the 7,000 Portuguese troops to the 40,000 Castilians, the Portuguese force represented only 17.5% of the size of the opposing army—yet they still won the battle.
