February 3– The five Lords Appellant, regents for King Richard II open a new session of the House of Commons and the House of Lords with the goal of exposing King Richard's attempt to make peace with France in order to drive them from power. After hearing the case of the Lords Appellant, the Parliament convicts five of King Richard's associates— Lord Chancellor Michael de la Pole; London's former Lord Mayor Nicholas Brembre; Duke of Ireland Robert de Vere; Archbishop of York Alexander Neville; and Chief Justice Robert Tresilian— guilty of ""living in vice, deluding the said king" and embracing the mammon of iniquity for themselves".
February 19– Chief Justice Robert Tresilian, one of the five advisors to King Richard convicted of treason in absentia, is discovered hiding in sanctuary at Westminster and is dragged by a mob into the Parliament. Because he was already convicted, Tresilian is hanged in publicon the same day.
March 12–Pope Urban VI issues a papal bull permitting the Lithuanian capital, Vilnius, to establish a cathedral, acknowledging that pagan objects have been discarded and that Christianity has come to the Baltic nation.
June 3– General Yi Song-gye overthrows the Emperor U of Goryeo and installs U's son, Chang of Goryeo, as the new Emperor.
June 4– The Merciless Parliament ends its session after four months spent primarily in trying officials for treason and further restricting the authority of King Richard II.
Ramesuan is reinstated as King of Ayutthaya (modern-day southern Thailand), after dethroning and executing 17-year-old King Thong Lan.
Goryeo Revolution: General Yi Seong-gye begins a four year revolution in Goryeo (modern-day Korea), after being ordered by King U of Goryeo to attack the superior Chinese army. King U is forced from power, and replaced by his son Chang.
Omar I is succeeded by Sa'id, as King of the Kanem-Bornu Empire (modern-day east Chad and Nigeria). Sa'id is succeeded in the same year by Kade Alunu. Omar and Sa'id are both killed by Bilala invaders from the west.
↑Langlois, John D. Jr. (1998). "The Hung-wu reign, 1368–1398". The Cambridge History of China, Volume 7: The Ming Dynasty, 1368–1644, Part 1. Cambridge: Cambridge University Press. p.159. ISBN0-521-24332-7.
12Tuck, J. A. (1969). "The Cambridge Parliament, 1388". The English Historical Review. 84 (331): 228–232.
↑Reuven Amitai and David Morgan, The Mongol Empire and Its Legacy (Leiden: Brill, 2000), p. 293 ISBN9789004119468