Editing 1439 (section)

=== January&ndash;March ===
* [[January 4]] &ndash; A truce is signed at [[Breslau]] between [[Albert II of Germany|King Albert of Hungary]] and King [[Casimir IV of Poland]] to end the 8-month war between the two kingdoms.<ref>{{cite book |author = József Köblös |author2=Szilárd Süttő |author3=Katalin Szende |title = Magyar Békeszerződések 1000–1526 |trans-title=Hungarian peace treaties 1000–1526 |publisher = Jókai Mór Városi Könyvtár |location = [[Pápa]], Hungary |chapter = 1474. Lengyel-magyar békekötés (Ófalui béke) |trans-chapter=1474. Polish-Hungarian peace conclusion (peace of Ófalu) |pages = 198–206 |year = 2000 |language = hu |isbn = 963-00-3094-2}}</ref>
* [[January 9]] &ndash; A [[David's Rebellion|rebellion by peasants in Finland]] against the Swedish government, led by [[:fi:Anian Daavid|Anian Daavid]], is ended by the Swedish Army after intervention by the [[Archdiocese of Turku|Bishop of Turku]]. After confiscation of some untillable land to compensate other land owners for damages, the peasants are pardoned upon taking an oath to never rise up against the Swedish Crown again.<ref>{{Cite web |title=Davidin kapina |url=https://www.messon.fi/daavid.htm |access-date=2023-10-21 |website=www.messon.fi}}</ref><ref name=":2">{{Cite web |title=David - Svenskt Biografiskt Lexikon |url=https://sok.riksarkivet.se/sbl/Presentation.aspx?id=17292 |access-date=2023-10-21 |website=sok.riksarkivet.se}}</ref>
* [[January 10]] &ndash; [[Pope Eugene IV]], who had convened the [[Council of Florence|Council of Ferrara]] a year earlier to fight the reforms of the [[Council of Basel]], orders the transfer of its participants from Ferrara to [[Florence]].<ref name=Stieber/>
* [[January 17]] &ndash; As part of [[Ming dynasty|Ming China]]'s [[Luchuan–Pingmian campaigns|campaign]] against the [[Möng Mao]] kingdom in south China, General Fang Zheng, commander of 295,000 troops, attacks the stockade of the Mao kingdom's General Si Renfa and forces the enemy to retreat southward., after which he continued in pursuit. However by this time his troops were exhausted and his supply lines were cut off. He requested reinforcements, but Mu Sheng only sent a small number as he was angry that Fang Zheng had disobeyed orders. Fang Zheng was then defeated at Kongni where he had pursued Si Renfa, and "fell into an ambush of the elephant phalanx of his enemy", at which point he ordered his son to escape, and died with his troops<ref>.{{Cite journal |first=Foon Ming|last=Liew |title=The Luchuan-Pingmian Campaigns (1436–1449) in the Light of Official Chinese Historiography|year=1996 |journal=Oriens Extremus |volume= 39 |issue= 2 |page=173 |jstor=24047471 }}</ref>
* [[January 20]] &ndash; In England, [[John Juyn]] becomes the new [[Lord Chief Justice of England and Wales|Chief Justice of the King's Bench]].<ref>[[John Campbell, 1st Baron Campbell|Campbell, John]], ''Lives of the Chief Justices of England'', (3rd ed.)(London: John Murray 1874)</ref>
* [[February 17]] &ndash; In the [[Duchy of Cieszyn]] in Poland, the Duke, [[Wenceslaus I, Duke of Cieszyn|Wenceslaus I]] marries [[Elisabeth of Brandenburg, Duchess of Brzeg-Legnica and Cieszyn|Elisabeth of Hohenzollern]], the daughter of the [[Elector of Brandenburg]], [[Frederick I, Elector of Brandenburg|Friedrich]].<ref>Kazimierz Jasiński, ''Rodowód Piastów śląskich'' (Lineage of the Piast Dyansty of Silesia) (Ossoliński National Institute. 1977), pp. 166-167.</ref>
* [[March 19]] &ndash; [[Aedh mac Tairdelbach Óg Ó Conchobair|Aedh mac Tairdelbach]] becomes the new [[List of kings of Connacht|King of Connacht]] in what is now [[County Roscommon]] of Ireland upon the death of his nephew, [[Cathal mac Ruaidri Ó Conchobair]], who had been King of Connacht since 1426.<ref>Byrne, Francis John (2001), ''Irish Kings and High-Kings'', Dublin: Four Courts Press, {{ISBN|978-1-85182-196-9}}</ref>
* [[March 26]] &ndash; Meeting in Germany, the Diet of Mainz, summoned by the new Holy Roman Emperor, Frederick III, to consider the case of Pope Eugene IV, votes to deprive Eugene IV of his authority within the Empire and to elect a new Diet to meet in Frankfurt in 1440.