Editing 1287 (section)

==== Europe ====
* [[January 17]] &ndash; Aragonese forces led by King [[Alfonso III of Aragon|Alfonso III]] ('''the Liberal''') conquer the island of [[Menorca]]. He signs the "Treaty of San Agayz" with Sultan [[Abû 'Umar ibn Sa'îd]] on [[January 21]]. Alfonso accepts a policy of free trade for merchants and their property. He also concludes an alliance against the Marinids with [[Abu Said Uthman I]], ruler of the Zayyanid [[Kingdom of Tlemcen]] (modern [[Algeria]]). He proposes to supply him with five to ten galleys (with food and other goods) in exchange for 500 elite Zayyanid horsemen.<ref>Joseph F. O'Callaghan (2011). ''The Gibraltar Crusade: Castile and the Battle for the Strait'', p. 95. {{ISBN|978-08122-2302-6}}.</ref>
* Alfonso III ('''the Liberal''') is forced to make concessions to the nobility after an aristocratic uprising (called the [[Union of Aragon]]). In particular, he grants his barons a "Bill of Rights", known as the ''Privilegium Generale''. This leaves a heritage of disunity and further dissent among the nobility, who increasingly see little reason to respect the throne, and brings the [[Crown of Aragon]] to the point of anarchy. Alfonso, who is not pleased with the anti-royalist movement, is forced to accept the ''Magna Carta'' ('''Great Charter''').<ref>Chaytor, Henry John (1933). ''A History of Aragon and Catalonia'', p. 126. London: Methuen.</ref>
* [[June]] &ndash; [[Rabban Bar Sauma]], Chinese Nestorian monk and diplomat, travels from [[Constantinople]] to [[Kingdom of Italy (Holy Roman Empire)|Italy]]. There he arrives in Naples and witnesses a sea battle in the harbour between the Aragonese and the Angevin fleets. Bar Sauma goes to [[Rome]], but arrives too late to meet Pope [[Pope Honorius IV|Honorius IV]], who recently died. He instead is engaged in negotiations with the cardinals, who are in a conclave to elect a successor, and visits the [[St. Peter's Basilica]]. Bar Sauma goes to [[Genoa]], where he receives a warm welcome.<ref>[[Steven Runciman]] (1952). ''A History of The Crusades. Vol III: The Kingdom of Acre'', p. 333. {{ISBN|978-0-241-29877-0}}.</ref>
* [[June 23]] &ndash; [[Battle of the Counts]]: An Aragonese-Sicilian fleet (some 50 galleys) under Admiral [[Roger of Lauria]] defeat a larger Angevin fleet of 70 galleys near [[Naples]]. After a [[feigned retreat]], Roger attacks the Angevin galleys from all sides. During the battle, which last much of the day, the Angevin fleet is scattered, leaving about 40 galleys to be captured, along with 5,000 prisoners. After the victory, without any authorization from King [[James II of Majorca|James II]], Roger makes a truce with the Neapolitans (who are allies of the Angevins). 
* [[September]] &ndash; Rabban Bar Sauma arrives in [[Paris]], and is received in an audience by King [[Philip IV of France|Philip IV]] ('''the Fair'''). He spends one month at the royal court, during his stay, Philip himself escorts him around the [[Sainte-Chapelle]] (or '''Holy Chapel''') to see the collection of [[Passion of Jesus|Passion relics]] by late King [[Louis IX of France|Louis IX]] ('''the Saint'''). Philip gives Bar Sauma many presents and sends one of his noblemen, [[Gobert de Helleville]], to return with him to Mongol lands. In response, he attempts to form a military alliance with [[France in the Middle Ages|France]] and [[England]].<ref>Steven Runciman (1952). ''A History of The Crusades. Vol III: The Kingdom of Acre'', p. 334. {{ISBN|978-0-241-29877-0}}.</ref>
* [[December 14]] &ndash; A huge storm and associated storm tide in the [[North Sea]] and [[English Channel]], known as [[St. Lucia's flood]] in the [[Netherlands]], kills thousands and reshapes the coastline of the Netherlands and [[Kingdom of England|England]]. In the Netherlands, a fringing barrier between the North Sea and a shallow lake collapses, causing the fifth-largest flood in recorded history – which creates the [[Zuiderzee|Zuider Zee]] inlet, and kills over 50,000 people. It also gives sea access to [[Amsterdam]], allowing its development as an important port city.
* Winter &ndash; [[Third Mongol invasion of Poland|Mongol invasion of Poland]]: Mongol forces (some 30,000 men) under [[Talabuga|Talabuga Khan]] and [[Nogai Khan]], attack [[Lesser Poland|Poland]] for the third time. The cities of [[Lublin]], [[Sandomierz]] and [[Sieradz]] are devastated by the invaders. Nogai Khan besieges [[Kraków]] and launches an unsuccessful assault on the fortified city, suffering heavy casualties in the process.