1427 CE

Pope Martin V orders the Roman Catholic bishops of Portro and Alba to work on driving the Fraticelli faction of the Franciscan Order from Italy. Hussite Wars: Battle of Tachov – The Hussites decisively beat the crusader armies, ending the Fourth Anti-Hussite Crusade. Lincoln College, a constituent college of the University of Oxford in England, is founded by the Bishop of Lincoln.

In the 1420s, the 15th century.

Geopolitics & Diplomacy

  • June 16 – John, Margrave of Brandenburg-Kulmbach ("the Alchemist", of the Hohenzollern family), signs a peace agreement with the dukes of the various Pomeranian duchies at the Brandenburg city of Templin, ending the latest Pomeranian-Brandenburg conflict.source
  • October 13 – The English Parliament assembles at Westminster after being summoned on July 15 by England's Regency Council. John Tyrrell is elected as Speaker of the House of Commons.source
  • Bhaktapur Royal Palace in Nepal is built by King Yaksa Malla.source

Conflict & Security

  • January – Radu II of Wallachia resumes the throne of Wallachia for the fourth time, but a seven-year struggle for it ends in March when he is defeated in battle, and probably killed, by Dan II, who resumes the throne for a fifth term.source
  • March 29 – In Vietnam, the Ming dynasty China army invades a second time, bringing 120,000 reinforcement troops led by General Mu Sheng to crush the Lam Sơn uprising.source
  • April 22 – In France, Edmund Beaufort, 2nd Duke of Somerset, is granted the control of the county of Mortain in Normandy by the Duke of Bedford, Regent for King Henry VI in France, as a reward for his military service during the war against the French.source
  • July 15 – The Siege of Montargis is started in France by 1,000 Englishmen led by the Earl of Warwick and lasts for seven weeks.source
  • August 4 – Hussite Wars: Battle of Tachov – The Hussites decisively beat the crusader armies, ending the Fourth Anti-Hussite Crusade.source
  • September 5 – A French Army relief force of 1,600 soldiers, led by Jean de Dunois, ends the siege of Montargis by luring the English Army into a trap. The Montargis defenders open the city gates and the English are attacked from two sides, losing more than 1,000 men and all of their artillery.source
  • September 29 – Lam Sơn uprising: China's General Liu Sheng arrives at China's border with Vietnam where a meeting is held with rebel leader Lê Lợi, who proposes settling the war by recognizing Tran Cao's rule as King of Đại Việt. The proposal is a pretext for Liu Sheng's army being lured into an ambush that soon follows, with 70,000 Chinese troops killed.source
  • November 12 – To avoid further destruction of the Chinese army, General Wang Tong begins withdrawing troops from northern Vietnam's Jiaozhi region, having accepted a proposal by Vietnam without the approval of China's Xuande Emperor. The Emperor is informed of the proposal and agrees on November 20 to accept terms of peace.source
  • December 29 – Victorious in the Lam Sơn uprising, Đại Việt (Vietnam) succeeds in forcing the withdrawal of Chinese troops from its territory as China's General Wang Tong and Vietnam's General Nguyễn Trãi agree to terms of disarmament and repatriation of 86,640 Ming Chinese prisoners in return for Chinese withdrawal.source
  • The Conflict of Druimnacour occurs in Sutherland, Scotland.source
  • Minrekyansa becomes King of Ava (ancient Myanmar).source
  • Bremen is expelled from the Hanseatic League.source
  • Battle of the Echinades: A Byzantine fleet defeats the fleet of Carlo I Tocco.source

Exploration & Expansion

  • August 17 – The first band of Gypsies visits Paris, according to an account of the citizens of Paris.source
  • Diogo de Silves, Portuguese navigator, discovers seven islands of the Azores archipelago.source

Religion & Belief

  • January 16 – The papacy of Pope Gabriel V of Alexandria, leader of the Coptic Orthodox Church in Egypt, ends with his death after a reign of more than 17 years.source
  • May 11 (16 Pashons, 1143 AM) – At Alexandria, Farag El-Maksi is elected as the new Patriarch of the Coptic Orthodox Christians and takes the regnal name of Pope John XI.source
  • June 7 – Pope Martin V orders the Roman Catholic bishops of Portro and Alba to work on driving the Fraticelli faction of the Franciscan Order from Italy.source
  • October 13 – Lincoln College, a constituent college of the University of Oxford in England, is founded by the Bishop of Lincoln.source
  • The Celestine Order is established in France.source

Crime & Justice

  • The first witch hunts begin, in Switzerland.source

Climate & Environment

  • February 23 – In Spain, the first tremors are felt in the Principality of Catalonia of what will become a devastating 6.7 magnitude earthquake that will happen less than a year later, on February 2, 1428.source

Culture & Society

  • June 27 – John III, Duke of Mecklenburg-Stargard, is released from imprisonment after swearing an oath of allegiance to John, Margrave of Brandenburg.source
  • The Celebration of Sant Jordi (Saint George) begins in Catalonia (he will later become its patron saint).source

Births

  • February 27 – Ruprecht, Archbishop of Cologne (died 1480)source
  • May 8 – John Tiptoft, 1st Earl of Worcester, Lord High Treasurer (died 1470)source
  • May 29 – Françoise d'Amboise, duchess consort of Brittany, co-founder of the first monastery of the Carmelites in France (died 1485)source
  • 29 May - Françoise d'Amboise, saint (died 1485)Francesource
  • June 22 – Lucrezia Tornabuoni, Italian writer, adviser and spouse of Piero di Cosimo de' Medici (died 1482)source
  • September 9 – Thomas de Ros, 9th Baron de Ros, English politician (died 1464)source
  • October 26 – Archduke Sigismund of Austria (died 1496)source
  • November 24 – John Stafford, 1st Earl of Wiltshire (died 1473)source
  • November 29 – Zhengtong Emperor of China (died 1464)source
  • November 30 – Casimir IV Jagiellon, King of Poland (died 1492)source
  • date unknown – Shen Zhou, Chinese painter (died 1509)source

Deaths

  • April 17 – John IV of Brabant (born 1403)source
  • 17 April - John IV, Duke of Brabant (born 1403)Francesource
  • May 7 – Thomas la Warr, 5th Baron De La Warr, English churchmansource
  • May 28 – Henry IV, Count of Holstein-Rendsburg (born 1397)source
  • July 19 – Stefan Lazarević, ruler of the Serbian Despotate, dies at Belgrade and is succeeded by his nephew, Đurađ Branković.source
  • July 19 – Stefan Lazarević, Despot of Serbia (born 1377)source
  • Qu You, Chinese novelist (born 1341)source
  • Itzcoatl becomes the 4th Tlatoani of Tenochtitlan, after his nephew Chimalpopoca is killed by the Maxtla, at Azcapotzalco.source
  • Gentile da Fabriano, Italian paintersource
  • Chimalpopoca, Aztec Tlatoani (ruler) of Tenochtitlán (born 1397)source
  • Jehuda Cresques, Catalan cartographer (born 1350)source
  • Radu II Prasnaglava, ruler of Wallachia, probably killed in or after a lost battlesource
  • Unknown - Amaury de Sévérac, soldierFrancesource