September 1896 – Domitian, who has been conducting a reign of terror for the past three years, is assassinated as a result of a plot by his wife Domitia and two Praetorian prefects. 96 – Nerva is proclaimed Roman emperor after Domitian is assassinated. 324 – Constantine the Great decisively defeats Licinius in the Battle of Chrysopolis, establishing Constantine's sole control over the Roman Empire. 1048 – Battle of Kapetron between a combined Byzantine-Georgian army and a Seljuq army.
February 11327 – The teenaged Edward III is crowned King of England, but the country is ruled by his mother Queen Isabella and her lover Roger Mortimer. 1411 – The First Peace of Thorn is signed in Thorn (Toruń), Monastic State of the Teutonic Knights (Prussia). 1662 – The Chinese general Koxinga seizes the island of Taiwan after a nine-month siege. 1713 – The Kalabalik or Skirmish at Bender results from the Ottoman sultan's order that his unwelcome guest, King Charles XII of Sweden, be seized.
March 26590 – Emperor Maurice proclaims his son Theodosius as co-emperor of the Byzantine Empire. 1021 – The death of the Fatimid caliph al-Hakim bi-Amr Allah, kept secret for six weeks, is announced, along with the succession of his son, al-Zahir li-i'zaz Din Allah. 1027 – Pope John XIX crowns Conrad II as Holy Roman Emperor. 1169 – Saladin becomes the emir of Egypt. 1344 – The Siege of Algeciras, one of the first European military engagements where gunpowder was used, comes to an end.
November 2619 – A qaghan of the Western Turkic Khaganate is assassinated in a Chinese palace by Eastern Turkic rivals after the approval of Tang emperor Gaozu. 1410 – The Peace of Bicêtre suspends hostilities in the Armagnac–Burgundian Civil War. 1675 – Plymouth Colony governor Josiah Winslow leads a colonial militia against the Narragansett during King Philip's War. 1795 – The French Directory, a five-man revolutionary government, is created. 1868 – Time zone: New Zealand officially adopts a standard time to be observed nationally.
December 30534 – The second and final edition of the Code of Justinian comes into effect in the Byzantine Empire. 999 – Battle of Glenmama: The combined forces of Munster and Meath under king Brian Boru inflict a crushing defeat on the allied armies of Leinster and Dublin near Lyons Hill in Ireland. 1066 – Granada massacre: A Muslim mob storms the royal palace in Granada, crucifies Jewish vizier Joseph ibn Naghrela and massacres most of the Jewish population of the city. 1419 – Hundred Years' War: Battle of La Rochelle.
March 11222 – Roman emperor Elagabalus is murdered alongside his mother, Julia Soaemias. He is replaced by his 14-year old cousin, Severus Alexander. 843 – Triumph of Orthodoxy: Empress Theodora II restores the veneration of icons in the Orthodox churches in the Byzantine Empire. 1343 – Arnošt of Pardubice becomes the last Bishop of Prague (3 March 1343 O.S.), and, a year later, the first Archbishop of Prague. 1387 – Battle of Castagnaro: Padua, led by John Hawkwood, is victorious over Giovanni Ordelaffi of Verona.
January 18474 – Seven-year-old Leo II succeeds his maternal grandfather Leo I as Byzantine emperor. He dies ten months later. 532 – Nika riots in Constantinople fail. 1126 – Emperor Huizong abdicates the Chinese throne in favour of his son Emperor Qinzong. 1486 – King Henry VII of England marries Elizabeth of York, daughter of Edward IV, uniting the House of Lancaster and the House of York. 1562 – Pope Pius IV reopens the Council of Trent for its third and final session. 1586 – The magnitude 7.
July 271054 – Siward, Earl of Northumbria, invades Scotland and defeats Macbeth, King of Scotland, somewhere north of the Firth of Forth. 1189 – Friedrich Barbarossa arrives at Niš, the capital of Serbian King Stefan Nemanja, during the Third Crusade. 1202 – Georgian–Seljuk wars: At the Battle of Basian the Kingdom of Georgia defeats the Sultanate of Rum. 1214 – Battle of Bouvines: Philip II of France decisively defeats Imperial, English and Flemish armies, effectively ending John of England's Angevin Empire.
December 21AD 69 – The Roman Senate declares Vespasian emperor of Rome, the last in the Year of the Four Emperors. 1124 – Pope Honorius II is consecrated, having been elected after the controversial dethroning of Pope Celestine II. 1140 – After a siege of several weeks, the city of Weinsberg and its castle surrender to Conrad III of Germany. 1237 – The city of Ryazan is sacked by the Mongol army of Batu Khan. 1361 – The Battle of Linuesa is fought in the context of the Spanish Reconquista between the forces of the Emirate of Granada and the combined army of the Kingdom of Castile and of Jaén resulting in a Castilian victory.
July 25306 – Constantine I is proclaimed Roman emperor by his troops. 315 – The Arch of Constantine is completed near the Colosseum in Rome to commemorate Constantine I's victory over Maxentius at the Milvian Bridge. 677 – Climax of the Siege of Thessalonica by the Slavs in a three-day assault on the city walls. 864 – The Edict of Pistres of Charles the Bald orders defensive measures against the Vikings. 918 – Wang Geon becomes King of Goryeo after overthrowing Gung Ye in a coup the previous day 1137 – Eleanor of Aquitaine marries Prince Louis, later King Louis VII of France, at the Cathedral of Saint-André in Bordeaux.
