Events

• August 14 - Battle of Aljubarrota between the Portuguese under John I of Portugal and the Castilians, under John I of Castile. The decisive Portuguese victory garantees independence and ends the 1383-1385 Crisis
• John I of Portugal becomes the first Portuguese king of the House of Aviz
• The Union of Krewo established the Jagiellonian dynasty in Poland and Lithuania through the marriage of Queen Hedwig of Poland and Grand Prince Jagiello of Lithuania and saw the acceptance of Roman Catholicism by the Lithuanian elite.
• The marriage of Charles VI of France and Isabella of Bavaria-Straubing is the first French court ball

Births

• Margaret Holland - married John Beaufort

Deaths