April – June April 6 – Siege of Bursa: Ottoman forces (some 10,000 men) led by Sultan Orhan I capture the Byzantine city of Bursa. Orhan makes Bursa the first official Ottoman capital.Nolan, Cathal J. (2006). The Age of Wars of Religion, 1000–1650: An Encyclopedia of Global Warfare and Civilization, pp. 100–101. Volume 1. Greenwood Publishing Group. .Rogers, Clifford (2010). The Oxford Encyclopaedia of Medieval Warfare and Military Technology, p. 261. Volume 1. Oxford University Press. . April 19 – The Peace of Arques, brokered by King Charles IV of France, ends the Flemish Revolt, but the treaty is not supported by rebel districts in Flanders.Tebrake, William H. (1993). A Plague of Insurrection: Popular Politics and Peasant Revolt in Flanders, 1323–1328, p. 98. University of Pennsylvania Press. May 4 – King Christopher II of Denmark, forced to flee during an uprising, promises to give the Danish Principality of Rügen to John III of Werle and Henry II, Lord of Mecklenburg, leading to the First War of the Rügen Succession. June 3 – The Treaty of Novgorod, a 10-year armistice, ends decades of border skirmishes between Norway and Novgorod in the far-northern region of Finnmark. June 6 – In Denmark, the Reichsrat votes to remove King Christopher II from office and to replace him with 11-year-old Valdemar V, Duke of Schleswig. Valdemar's uncle, Count Gerhard of Holstein, becomes the regent for King Valdemar.
april – june april 6 – siege of bursa ottoman forces (some 10000 men) led by sultan orhan i capture the byzantine city of bursa orhan makes bursa the first official ottoman capitalnolan cathal j (2006) the age of wars of religion 1000–1650 an encyclopedia of global warfare and civilization pp 100–101 volume 1 greenwood publishing group rogers clifford (2010) the oxford encyclopaedia of medieval warfare and military technology p 261 volume 1 oxford university press  april 19 – the peace of arques brokered by king charles iv of france ends the flemish revolt but the treaty is not supported by rebel districts in flanderstebrake william h (1993) a plague of insurrection popular politics and peasant revolt in flanders 1323–1328 p 98 university of pennsylvania press may 4 – king christopher ii of denmark forced to flee during an uprising promises to give the danish principality of rügen to john iii of werle and henry ii lord of mecklenburg leading to the first war of the rügen succession june 3 – the treaty of novgorod a 10-year armistice ends decades of border skirmishes between norway and novgorod in the far-northern region of finnmark june 6 – in denmark the reichsrat votes to remove king christopher ii from office and to replace him with 11-year-old valdemar v duke of schleswig valdemar's uncle count gerhard of holstein becomes the regent for king valdemar