January 6 – Officials from the Swiss Canton of Lucerne, arrive in the village of Sempach, at the time under control of Austria and the Habsburg family, and offer Swiss citizenship and rights. Lucerne’s representatives enter into similar pacts with other Austrian-controlled towns, including Meienberg, and bring with them soldiers from the Swiss Confederacy.[1]
January 11 – Union of Krewo: A delegation of Poland’s nobles visits the Grand Duke Jogaila of Lithuania at Valkaviskas (now Vawkavysk in Belarus and informs him that they will elect him as the new King of Poland on the condition that he convert from Lithuania’s polytheistic religion to Christianity, and that he marry the Queen of Jadwiga of Poland. Jogaila agrees to the terms. [2]
January 14 – The Austrian garrison at Meienberg responds to the overtures from the Swiss canton of Lucerne and kills over 140 of the Swiss Confederacy troops, starting a war between the two nations.[1]
February 1 – Meeting at Lublin, the nobles of Poland elect Grand Duke Jogaila as King of Poland.[3]
February 15 – Grand Duke Jogaila of Lithuania is baptized by the Roman Catholic Bishop Bodzanta of Gniezno at Wawel Cathedral, Kraków after converting to Christianity, and takes the name Wladyslaw II.[3]
February 24 – Elizabeth of Bosnia, the mother of the overthrown Queen Mary of Hungary and Croatia, arranges the assassination of Charles III of Naples, the ruler of Hungary, Naples, Achaea and Croatia, with the result that Mary is reinstated as Queen of Hungary and Croatia; Charles’ son, Ladislaus, becomes King of Naples; and a period of interregnum begins in Achaea, lasting until 1396. The rule of Achaea is sought by numerous pretenders, none of whom can be considered to have reigned.
June 9 – Queen Elizabeth of Hungary pledges to assist King Wladyslaw II of Poland against his enemies, the Teutonic Knights, who question the legitimacy of the King’s marriage to Queen Jadigwa.[7]
Battle of Sempach: Soldiers from cantons of the Old Swiss Confederacy defeat the Austrian Habsburg Army in a battle that leads to the unification of the cantons into the nation of Switzerland.
John of Gaunt, Duke of Lancaster and oldest surviving son of the late King Edward II of England, departs from England with 5,000 men and a fleet of English and Portuguese ships to make good his claim to the throne of Castile. John, whose nephew became King Richard II upon Edward’s death, claims the Castilian throne by right of his marriage to Constanza of Castile in 1371.[9]
August 8 – King Richard II of England summons the members of the House of Commons and the House of Lords to assemble at Westminster Abbey on October 1 for his 14th Parliament, dubbed by historians as the “Wonderful Parliament“.[12] Although the King’s purpose is to secure funding to defend against an imminent invasion from France, the parliament members begin plans to reform the unpopular king’s government.
August 17 – Karl Thopia, Prince of Albania, enters into an alliance with the Republic of Venice. Albania agrees to participate in all wars of the Republic or to pay auxiliary funds and supply grain, as well as to protect Venetian buyers in Albania. [19] In return, Venice supplies a galley to Albania and protect Albania’s coast from the Ottoman Empire.[13]
October 1 – The “Wonderful Parliament” is opened at Westminster by King Richard’s Chancellor Michael de la Pole, while King Richard declines to attend after failing to call off his decision to summon the members.[12]
^Jucas, Mecislovas (2000), Lietuvos ir Lenkijos unija [The Union of Lithuania and Poland] (in Lithuanian), Aidai, p. 114, ISBN 9986-590-95-7
^ abDavies, Norman (2005), God’s Playground: A History of Poland. The Origins to 1795, vol. I, Oxford University Press, p. 95, ISBN 978-0-19-925339-5
^Durrell, Lawrence (1967). Prospero’s cell: a guide to the landscape and manners of the island of Corcyra. Olympia Press. p. 95. ISBN 1-60872-097-7.
^Baranauskienė, Inga (February 2012). “Onos Vytautienės kilmė ir giminė” [The origin and family of Ona Vytautienė]. Kultūros barai (Cultural Barriers) (in Lithuanian). 2: 65–66. ISSN0134-3106.
^Van Antwerp Fine, John (1994). The Late Medieval Balkans: A Critical Survey from the Late Twelfth Century to the Ottoman Conquest. University of Michigan Press. pp. 396–397. ISBN 0-472-08260-4.
^Engel, Pal (1999). Ayton, Andrew (ed.). The realm of St. Stephen: a history of medieval Hungary, 895–1526 Volume 19 of International Library of Historical Studies. Penn State Press. p. 198. ISBN 0-271-01758-9.
^ abParliament Rolls of Medieval England (2005). Given-Wilson, C. (ed.). “Richard II: October 1386”. British History Online. Woodbridge: Boydell and Brewer.{{cite web}}: CS1 maint: deprecated archival service (link)