page_title: 1400s (decade)
section_title: January–December
hierarchical_section_title: 1400s (decade) / Events / 1402 / January–December
context_page_description: The 1400s ran from January 1, 1400, to December 31, 1409.
context_section_description: January 29 – King Jogaila of the Poland–Lithuania Union answers the rumblings against his rule of Poland, by marrying Anna of Celje, a granddaughter of Casimir III of Poland.
  March 26 – David Stewart, Duke of Rothesay, heir to the throne of Scotland, dies while being held captive by his uncle, Robert Stewart, 1st Duke of Albany.
  May 21 – Following the death of Queen Maria of Sicily, her husband Martin I of Sicily, now sole ruler, marries Blanche of Navarre.
  June 22
  Battle of Nesbit Moor: An English force decisively defeats a returning Scottish raiding party.
  Battle of Bryn Glas: Welsh rebels under Owain Glyndŵr defeat the English on the England/Wales border. The Welsh capture Edmund Mortimer, son of the 3rd Earl, who defects to the Welsh cause, on 30 November marrying Owain's daughter Catrin.
  June 26 – Battle of Casalecchio: Gian Galeazzo Visconti, the Duke of Milan, crushes the forces of Bologna and Florence, but dies from a fever later this year and is succeeded by his son, Gian Maria Visconti.
  July 12 – The Ming dynasty prince Zhu Di and his army occupy the Ming capital, Nanjing. The Jianwen Emperor is either lost or killed and Zhu Di takes over the throne as the Yongle Emperor, marking the end of the Jingnan campaign.
  July 20 – Battle of Ankara: An invading Timurid Empire force defeats the Ottoman Sultan Bayezid I, who is captured.  A period of interregnum begins in the Ottoman Empire, with the future Mehmed I as one of the leading claimants to the throne. After Serbia is freed from Ottoman rule, Stefan Lazarević is crowned Despot of Serbia.
  September – The English Parliament passes penal Laws against Wales which stop the Welsh from gathering together, obtaining office, carrying arms and living in English towns. Any Englishman who marries a Welsh woman also comes under the laws.
  September 14 – Battle of Homildon Hill: Northern English nobles, led by Sir Henry Percy (Hotspur), and using longbows, decisively defeat a Scottish raiding army and capture their leader, the Earl of Douglas.
caption: Capture of Bayezid I after Battle of Ankara
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