Editing 1380 (section)

=== January&ndash;December ===
* [[February]] &ndash; [[Olaf II of Denmark]] also becomes [[Olaf IV of Norway]], with his mother Margrete ([[Margaret I of Denmark|Margaret]]) as regent. [[Iceland]] and the [[Faroe Islands]], as parts of [[Norway]], pass under the Danish crown.
* [[March 13]] &ndash; The southern England town of [[Winchelsea]] in [[East Sussex]] is attacked and burned by an expeditionary force from France for a second time.<ref name=Fires>"Fires, Great", in ''The Insurance Cyclopeadia: Being an Historical Treasury of Events and Circumstances Connected with the Origin and Progress of Insurance'', Cornelius Walford, ed. (C. and E. Layton, 1876) p27</ref>
* [[May 31]] &ndash; [[Grand Duke of Lithuania]] [[Jogaila]] signs the secret [[Treaty of Dovydiškės]], with the [[Teutonic Knights]]. This sparks a civil war with his uncle [[Kęstutis]].
* [[June 21]] &ndash; [[Battle of Chioggia]]: the [[Republic of Venice|Venetian]] fleet defeats the Genoese.
* [[July 27]] &ndash; [[Henry IV of England|Henry Bolingbroke]] marries [[Mary de Bohun]] at [[Arundel Castle]].
* [[September 8]] &ndash; [[Battle of Kulikovo]]: Russian forces under Grand Prince [[Dmitry Donskoy]] of Moscow resist a large invasion by the [[Blue Horde]], [[Lithuania]] and [[Ryazan]], stopping their advance.
* [[September 16]] &ndash;  [[Charles V of France]] is succeeded by his twelve-year-old son, [[Charles VI of France|Charles VI]].
* [[October 2]] &ndash; [[Caterina Visconti]] marries her first cousin, [[Gian Galeazzo Visconti]], later Duke of Milan, at the Church of San Giovanni in Conca.
* [[November 3]] &ndash; [[Charles VI of France]], who succeeded  his father ([[Charles V of France]]) in September, is crowned.