Editing April 9 (section)

===Pre-1600===
* [[193]] &ndash; The distinguished soldier [[Septimius Severus]] is proclaimed emperor by the army in [[Illyricum (Roman province)|Illyricum]].<ref>{{cite book|first=Jacques|last=Legrand|title=Chronicle of the World|publisher=Ecam Publication|year=1989|page=236|isbn=0-13-133463-8}}</ref> 
* [[475]] &ndash; [[Byzantine Emperor]] [[Basiliscus]] issues a circular letter (''Enkyklikon'') to the bishops of his empire, supporting the [[Monophysitism|Monophysite]] [[christological]] position.<ref>{{cite book|last=Fontaine|first=Petrus F.M.|title=The Light and the Dark: A Cultural History of Dualism. Volume 15: Imperialism in Medieval History I. Dualism in Byzantine History 476-638 and Dualism in Islam 572-732|location=Amsterdam|publisher=J.C. Gieben|date=1986|oclc=15535828|page=196}}</ref>
* [[537]] &ndash; [[Siege of Rome (537–538)|Siege of Rome]]: The Byzantine general [[Belisarius]] receives his promised reinforcements, 1,600 cavalry, mostly of [[Huns|Hunnic]] or [[Slavs|Slavic]] origin and expert [[Archery|bowmen]]. Despite shortages, he starts raids against the [[Ostrogoths|Gothic]] camps and [[Vitiges]] but is forced into a stalemate.
*[[1241]] &ndash; [[Battle of Legnica|Battle of Liegnitz]]: [[Mongol Empire|Mongol]] forces defeat the Polish and German armies.<ref>{{cite book|last=Grant|first=R.G.|title=1001 Battles That Changed the Course of World History|location=New York|publisher=Chartwell Books|date=2017|isbn=9780785835530|url=https://books.google.com/books?id=2ZNADwAAQBAJ|page=168}}</ref>
*[[1288]] &ndash; [[Mongol invasions of Vietnam]]: [[Yuan dynasty|Yuan]] forces are defeated by [[Trần dynasty|Trần]] forces in the [[Battle of Bạch Đằng (1288)|Battle of Bach Dang]] in present-day northern Vietnam.<ref>{{cite book|editor-last=Embree|editor-first=Ainslie T.|title=Encyclopedia of Asian History. Volume 4: Sri—Zuny|location=New York|publisher=Scribner|date=1988|isbn=9780684189017|page=128}}</ref>
*[[1388]] &ndash; Despite being outnumbered 16:1, forces of the [[Old Swiss Confederacy]] are victorious over the [[Archduchy of Austria]] in the [[Battle of Näfels]].<ref>{{cite journal|last=Widmer|first=Marie|title=Three Decisive Battles in Swiss History|journal=The American Educational Review|date=October 1914|page=18|accessdate=April 15, 2022|url=https://books.google.com/books?id=T5SgAAAAMAAJ}}</ref>
*[[1454]] &ndash; The [[Treaty of Lodi]] is signed, establishing a balance of power among northern Italian city-states for almost 50 years.<ref>{{cite book|last=Kirshner|first=Julius|title=The Origins of the State in Italy, 1300-1600|location=Chicago|publisher=University of Chicago Press|date=1996|isbn=9780226437699|url=https://books.google.com/books?id=gAvk-MkzVNsC|page=183}}</ref>