March 11–Hook and Cod wars: With the city of Delft in Holland in rebellion, the regent for Holland, Albert of Bavaria, orders the blocking of all waterways around Delft before beginning a formal siege if Delft does not surrender by April 1.
The Second Treaty of London is signed by the monarchs of England (King Edward III) and France (King Jean II, a prisoner of war since 1356 and signing under duress) with a goal of ending the two kingdom's conflict in the Hundred Years' War. Under its terms, which Jean's son the Dauphin Charles refuses to ratify, would have led to the cession of half of France's territory— including Brittany, Normandy, Anjou, Touraine and Maine— to England. King Edward then makes plans to invade France in October.
Hook and Cod wars: The siege of Heemskerk Castle, which was started on Dedcember 4 by Albert of Bavaria, administrator of Holland, for the Hook partisans, ends after three months with Heemskerk falling to Albert. During the siege, however, the city of Delft, controlled by the Cod sympathizers, has revolted.
April–June
April 1–Hook and Cod wars: Duke Albert I of Bavaria the Habsburg regent for Holland, begins the siege of Delft, a stronghold for the rebellious Cods. After 10 weeks, Delft surrenders in June under terms of dismantling the city walls and the payment to the Hooks of 40,000 ecus.
April 19– A 1357 truce agreed upon by England and France expires after two years, clearing the way for hostilities to resume.
May 29– The siege of Delft ends after two months as the city, a center for the Cods in the Hook and Cod wars, surrenders to the Hooks and the army of the Count of Holland, the regent Albert of Bavaria.
June 11– The Battle of Barcelona between the Spanish kingdoms of Castile (with aid from Portugal) and Aragon in the War of the Two Pedros, a naval battle off the coast of Barcelona, ends after two days. Althogh the Castilian Navy of more than 120 ships vastly outnumbers the 10 galleys of Aragon, the Aragonese make the first use of naval artillery and employs its new weapon, a bombard mounted on one of its ships.
June 20– Upon the death of Erik Magnusson, his claims to the Swedish throne die with him, and power is restored undivided to his father, King Magnus Eriksson. With this unexpected death of Erik Magnusson, a previous promise to give Helsingborg to Denmark was reneged on by Magnus Eriksson. But Valdemar IV Atterdag was far too ambitious a ruler to have his plan to reassemble the Danish kingdom fall into pieces, and so he proceeded to invade Scania the next year with his mercenary army.
August 23– (28 Ramadan760 AH) In what is now Spain, Ismail II becomes the new Sultan of Granada in a coup d'état against his half-brother, Muhammed V. About 100 men under Ismail's command scale the walls of the royal palace, the Alhambra, overpower the guards and kill the hajib Ridwan. Muhammad V is away from the palace and flees eastward to the city of Guadix, where his authority is still recognized.
October 28– King Edward III of England lands at Calais to begin the Reims campaign, a second invasion of France, after peace negotiations fail, and is determined to reach Reims in order to be crowned as the King of France.
November 4– The deposed Granadan sultan Muhammad V flees Europe after conceding defeat and sails to Africa, where he and other former officials end up at Fez in what is now Morocco.
probable date–Battle of Megara: A Christian coalition defeats a Turkish raider fleet.
earliest possible date–Bogdan I becomes Prince of Moldavia (modern-day Moldova) after freeing it from Hungarian control. He will be ancestor of the House of Bogdan, who will rule Moldavia for more than three centuries.
↑Fernández-Puertas, Antonio (1997). "The Three Great Sultans of al-Dawla al-Ismā'īliyya al-Naṣriyya Who Built the Fourteenth-Century Alhambra: Ismā'īl I, Yūsuf I, Muḥammad V (713–793/1314–1391)". Journal of the Royal Asiatic Society. Third Series. 7 (1). London: Cambridge University Press on behalf of Royal Asiatic Society of Great Britain and Ireland: 15–16.
↑Adam J. Kosto (3 May 2001). Making Agreements in Medieval Catalonia: Power, Order, and the Written Word, 1000-1200. Cambridge University Press. ISBN978-0-521-79239-4. Retrieved 19 June 2021.
↑Luttrell, Anthony (1975). "The Hospitallers at Rhodes, 1306–1421". In Setton, Kenneth M.; Hazard, Harry W. (eds.). A History of the Crusades, Volume III: The Fourteenth and Fifteenth Centuries. Madison and London: University of Wisconsin Press. pp. 278–313. ISBN0-299-06670-3.
↑Topping, Peter (1975). "The Morea, 1311–1364". In Setton, Kenneth M.; Hazard, Harry W. (eds.). A History of the Crusades, Volume III: The Fourteenth and Fifteenth Centuries. Madison and London: University of Wisconsin Press. pp. 104–140. ISBN0-299-06670-3.