April 14– The second Treaty of Guérande is concluded in France between Jean, Count of Penthièvre and Yann IV, Duke of Brittany as Penthièvre drops his claim to rulership of the Duchy in return for being released from Gloucester Castle in England and being paid a substantial indemnity. Penthièvre had been the eldest son of Charles of Blois-Châtillon, who had been Duke of Brittany until his death in 1364.
April– (Muharram783 AH) In what is now Afghanistan, the Siege of Herat by the Mongol conqueror Timur ends with the Persian city surrendering to the Mongols, in return for the populace being spared.
Peasants' Revolt: During further negotiations, Wat Tyler is murdered by the King's entourage. Noble forces subsequently overpower the rebel army. The rebel leaders are eventually captured and executed and Richard II revokes his concessions. The revolt is discussed in John Gower's Vox Clamantis and Froissart's Chronicles.
July 16– King Richard II of England summons the members of the English Parliament to assemble at Westminster on November 3.
July 17– The Battle of Saltes Island is fought off of the coast of Spain between the navies of the Kingdom of Portugal and the Crown of Castile, with all but one of the Portuguese fleet of 23 galleys being captured, and their crews taken prisoner, by a smaller force of 17 galleys commanded by Fernando Sánchez de Tovar.
August 25– Queen Joanna I of Naples surrenders the kingdom to Carlo di Durazzo, Duke of Slavonia, Croatia and Dalmatia, who had been able to start an invasion of Naples after the excommunication and order of deposition of Joanna by order of Pope Urban VI]. The Duke then takes the throne as King Carlo III.
September 25– King Wenceslaus IV of Bohemia grants Count Bernhard of Wurttemberg permission to rebuild fortresses that had been destroyed during the war with the Swabian League, despite an order by the Holy Roman Emperor Karl that forbids rearmament within the Empire.
November 3– The English Parliament assembles at Westminster on orders of King Richard II. The House of Commons elects Sir Richard Waldegrave as the Speaker of the House. The Parliament meets for almost four months before being adjourned on February 25.
December 26– Count Febus of Foix and the Duke of Berry meet at Capestang and work out an agreement to end their war, with the Duke agreeing to cease support of Febus's enemies, the Armagnacs, and Febus agreeing to recognize the Duke's authority over Languedoc.
Sonam Drakpa deposes Drakpa Changchub as ruler of Tibet.
The Ming dynasty of China annexes the areas of the old Kingdom of Dali, in modern-day Yunnan and Guizhou provinces, inhabited by the Miao and Yao peoples. Hundreds of thousands of Chinese (including military colonists) will migrate there from the rest of China.
In Ming dynasty China, the lijia census registration system begun in 1371 is now universally imposed, during the reign of the Hongwu Emperor. The census counts 59,873,305 people living in China in this year. This depicts a drastic drop in population since the Song dynasty, which counted 100 million people at its height in the early 12th century. A modern historian states that the Ming census is inaccurate, as China at around this time has at least 65,000,000 inhabitants, if not 75,000,000.
↑Verhandlungen des Historischen Vereins für Oberpfalz und Regensburg[Proceedings of the Historical Society for the Upper Palatinate and Regensburg] (in German). Historical Society for the Upper Palatinate and Regensburg. 1898. p.207.
↑Henneman, John Bell (2018). Olivier de Clisson and Political Society in France Under Charles V and Charles VI. University of Pennsylvania Press. p.101. ISBN9781512802573.
↑Kerala District Gazetteers: Alleppey (Kerala Superintendent of Government Presses, 1980) p.41