Editing 1439 (section)

=== April&ndash;June ===
* [[April 12]] &ndash; In a battle on [[Lake Garda]] in [[Italy]], a passage to the [[Adriatic Sea]], ships from the [[Duchy of Milan]] defeat ships from the [[Republic of Venice]] in battle and take control of the lake.<ref>{{cite book|first=Paolo Domenico |last=Malvinni |title=Galee tra le montagne|publisher=Poster trentino |year=2008 |page=39}}</ref>
* [[May 6]] &ndash; [[Battle of Grotnik]]: [[Władysław III of Poland|Wladyslaw III]]'s royal army, commanded by defeats the [[Hussite]] rebels, led by [[Spytko III of Melsztyn]], ending the non-Catholic movement in [[Poland]].<ref>{{cite book |title=Mała Encyklopedia Wojskowa (Small Military Encyclopedia)| publisher = Wydawnictwo Ministerstwa Obrony Narodowej (Ministry of National Defense Publishing House)|location = Warsaw |date=1967}}</ref>
* [[May 16]] &ndash; Pope Eugene, already found to be in contempt of the [[Council of Basel]], is declared by the Council to be a [[heresy|heretic]].<ref name=Stieber/>
* [[June 10]] &ndash; [[Joseph II of Constantinople|Joseph II]], the leader of the Eastern Orthodox Church as the 155th [[List of ecumenical patriarchs of Constantinople|Ecumenical Patriarch of Constantinople]], dies after a reign of 23 years, leaving a vacancy that is seen by the Roman Catholic Pope Eugene IV to declare a unification of the two churches to end the [[East–West Schism]] of 1054.<ref>{{Cite book |last=Magoulias |first=Harry J. |url=https://books.google.com/books?id=rPkcAAAAYAAJ |title=Decline and Fall of Byzantium to the Ottoman Turks, by Doukas - An Annotated Translation of Historia Turco-Byzantina |date=1975 |publisher=[[Wayne State University Press]] |isbn=978-0-8143-1540-8 |page=299 }}</ref>
* [[June 24]] &ndash; [[Sigismund, Archduke of Austria|Sigismund of Habsburg]] becomes the new [[List of rulers of Austria|Duke of Austria]] upon the death of his father, [[Frederick IV, Duke of Austria|Frederick IV]].<ref>{{cite book |title=A History of the Habsburg Empire 1273–1700 |first1=Jean |last1=Berenger |translator-first=C.A. |translator-last=Simpson |publisher=Routledge |year=2013 |page=62 }}</ref>
* [[June 25]] &ndash; The [[Council of Basel]] formally declares that Pope Eugene IV is deposed.<ref name=Stieber>Joachim W. Stieber,  (1978) [https://books.google.com/books?id=5R%202clxgcr4C ''Pope Eugene IV, the Council of Basel, and the Secular and Ecclesiastical Authorities in the Empire: The conflict over supreme authority and power in the Church.''] (Leiden: Brill, 1978) pp. 49–58</ref>
* [[June]] &ndash; The "[[Miracle of the Moose]]" takes place, according to [[Russian Orthodox Church|Russian]] hagiographers.