1431

January–December

• January 9 - Pretrial investigations for Joan of Arc begin at Rouen in France, which is under English occupation.
• February 21 - The trial of Joan of Arc for heresy begins.
• March - Alexander I Aldea takes the throne of Wallachia with support from Alexander I of Moldavia.
• March 3 - Pope Eugene IV succeeds Pope Martin V, to become the 207th pope.
• May 30 - Nineteen-year-old Joan of Arc is burned at the stake in Rouen.
• June 16 - The Teutonic Knights and Švitrigaila sign the Treaty of Christmemel, creating an anti-Polish alliance.
• September - Battle of Inverlochy: Donald Balloch defeats the Royalists.
• October 30 - The Treaty of Medina del Campo is signed, consolidating peace between Portugal and Castille.
• November 9 - The Battle of Ilava: The Hungarians defeat the Hussite army.
• November 18 - A treaty in Suceava concludes an attack on Poland, launched this year by Alexander I of Moldavia during the Lithuanian Civil War.
• December 13 - Vlad, future Prince of Wallachia as Vlad II Dracul, is made a member of the Order of the Dragon. Because of this, his son Vlad III the Impaler will inspire the literary figure named Dracula.
• December 16 - Henry VI of England is crowned King of France at Notre-Dame de Paris.

  Date unknown

• The University of Poitiers is founded.
• The Ayutthaya Kingdom besieges Angkor and sacks the Khmer capital, ending the Khmer Empire.
• Nezahualcoyotl is crowned Tlatoani of the Kingdom of Texcoco.
• Byzantine–Ottoman Wars: The Ottoman governor of Thessaly Turahan Bey breaks through the Hexamilion wall for the second time, and ravages the Peloponnese Peninsula.