Editing 1400 (section)

=== April&ndash;June===
* [[April 21]] &ndash; Sir [[Thomas Percy, 1st Earl of Worcester]], resigns as [[England]]'s [[Admiral of the North and West]] to join the resistance against [[Henry IV of England|King Henry IV]]. The office will remain vacant for more than six years. Percy will be beheaded in 1403 after his defeat in the [[Battle of Shrewsbury]].
* [[April 23]] &ndash; In what is now [[Romania]], [[Alexander I of Moldavia|Alexandru cel Bun]] (Alexander the Good) is installed as the new [[List of monarchs of Moldavia|Prince (Voivode)]] of [[Moldavia]] by [[Mircea the Elder]], the Voivode of [[Wallachia]], after Mircea removes the reigning monarch, [[Iuga of Moldavia|Prince Iuga]].
* [[April 25]] &ndash; [[Jingnan campaign]]: In the [[Shandong]] province of Ming dynasty China, [[Zhu Di]], Prince of Yan, defeats the Imperial forces of General [[Li Jinglong]] in the two-day Battle of Baigou River, by taking advantage of the chaos that results when a gust of wind breaks the staff of General Li's flag of battle. The Yan forces capture 100,000 of the Imperial soldiers as prisoners and Li and the others retreat to [[Jinan]]. 
* [[April]] &ndash; King [[Swa Saw Ke]], of [[Ava Kingdom|Ava]], the largest kingdom in Burma, dies after a reign of 33 years and is succeeded by his son, [[Tarabya of Ava|King Tarabya]], who reigns less than seven months before being assassinated.
* [[May 22]] &ndash; Meeting in [[Frankfurt]], three of the prince-electors of the [[Holy Roman Empire]] ([[Rupert, King of Germany|Rupert, elector of the Palatinate]], [[Rudolf III, Duke of Saxe-Wittenberg]], elector of Saxony, and [[Jobst of Moravia]], elector of Brandenburg) meet in [[May 1400 imperial election|an attempt to replace the Emperor]], [[Wenceslaus, King of the Romans]] because of his failure to stamp out civil unrest or to resolve the Western Schism. They select [[Frederick I, Duke of Brunswick-Lüneburg]] as the replacement for Wenceslaus. 
* [[June 5]] &ndash; Duke Frederick I of Brunswick-Lüneburg is assassinated after being identified as a rival to Wenceslaus, Holy Roman Emperor. Frederick, on his way back from a May 22 meeting of the prince-electors, is ambushed by a party of men led by [[Henry VII, Count of Waldeck|Count Henry of Waldeck]] while passing through the village of [[Kleinenglis]] in the [[Principality of Waldeck and Pyrmont]] (now part of the German state of [[Hesse]], near [[Borken, Hesse|Borken]]).