Editing 1421 (section)

=== July&ndash;September ===
* [[July 2]] &ndash; At [[Erciş]] in what is now Turkey, [[Iskandar (Qara Qoyunlu)|Iskandar ibn Yusuf]] is crowned as the [[List of rulers of Qara Qoyunlu|Sultan]] of [[Qara Qoyunlu]], a kingdom encompassing what are now eastern [[Turkey]], northwestern [[Iran]] and northern [[Iraq]], northern [[Armenia]] and all of [[Azerbaijan]].<ref>{{Cite journal |last=Minorsky |first=V. |date=1955 |title=The Qara-Qoyunlu And The Qutb-Shahs|journal=Bulletin of the School of Oriental and African Studies |volume=17 |issue=1 |pages=62 |doi=10.1017/s0041977x00106342 |issn=0041-977X}}</ref>
* [[July 15]] &ndash; A ceasefire is declared in the [[Great Frisian War]] as the representatives warring parties agree to a treaty at the city of [[Greetsiel]] in what is now the German region of [[East Frisia|Ostfriesland]]. A boundary is set at the [[Lauwers]] River in the Netherlands with the territory to the west ([[Friesland]]) going to the Frisian rebel group, the Skieringers. The lands to the east [[Groningen (province)|Groningen]] go the Fetkeapers.<ref>{{cite web|url=http://scripties.let.eldoc.ub.rug.nl/FILES/root/Master/DoorstroomMasters/Geschiedenis/2010/EngelsmaE.U.B./Ma-1381385-E._Engelsma.pdf|title=De Grote Friese Oorlog, Partijstrijd in de Friese landen: 1413-1422|last=Engelsma|first=Eise|date=2010-06-21|website=Rijksuniversiteit Groningen|language=Dutch|archive-url=https://web.archive.org/web/20170630214559/http://scripties.let.eldoc.ub.rug.nl/FILES/root/Master/DoorstroomMasters/Geschiedenis/2010/EngelsmaE.U.B./Ma-1381385-E._Engelsma.pdf|archive-date=2017-06-30}}</ref>
* [[August 5]] &ndash; At the [[Battle of Brüx]], Hussite troops led by [[Jan Želivský]], are defeated by the German Saxon baron [[Frederick I, Elector of Saxony|Frederick of Meissen]] at what is now the city of [[Most (city)|Most]] in what is now the [[Czech Republic]].<ref>Vavřinec z. Březové, '' Husitská kronika; Píseň o vítězství u Domažlic'' (Hussite Chronicle; Song of Victory at Domažlice) (Prague: Svoboda, 1979) p.252</ref> 
* [[August 29]] &ndash; [[Sayf al-Din Tatar]], becomes the new Mamluk Sultan of Egypt and Syria after leading a coup d'etat overthrowing and imprisoning his brother, Al-Muzaffar Ahmad. <ref name="EB1911/9"/>
* [[September 12]]&ndash; In what is now [[South Korea]], [[Taejong of Joseon|Taejong of Goryeo]], [[List of kings of Joseon|King of Joseon]] from 1400 to 1418, then King Emeritus since 1418, is crowned as the first [[Styles and titles in Joseon|Grand King Emeritus of Joseon]].<ref>{{Cite web |script-title=ko:한국민족문화대백과사전 – 태종 (太宗) |trans-title=Encyclopedia of Korean Culture – Taejong |url=https://encykorea.aks.ac.kr/Article/E0059039 |archive-url=https://web.archive.org/web/20220219192855/http://encykorea.aks.ac.kr/Contents/Index?contents_id=E0059039 |archive-date=19 February 2022 |access-date=1 September 2023 |website=[[Encyclopedia of Korean Culture]] |language=Korean}}</ref>
* [[September 28]]&ndash; A treaty is signed at Vienna between [[Sigismund, Holy Roman Emperor|Sigismund, King of Hungary, Croatia, Bohemia and Germany]] and [[Albert II of Germany|Albert V, Duke of Austria]] for Sigismund's daughter [[Elizabeth of Luxembourg]], to marry Albert (on April 19, 1422) and confirming Elizabeth's rights as heiress presumptive to the thrones of Hungary and Bohemia.<ref>{{cite book |title=Die Luxemburger: Eine spätmitelalterliche Dynastie gesamteuropäischer Bedeutung 1308-1437 |first=Jörg K. |last=Hoensch |publisher=Verlag W. Kohlhammer |language=de |year=2000|page=253 }}</ref>