October 234004 BC – James Ussher's proposed creation date of the world according to the Bible. 42 BC – Liberators' civil war: Mark Antony and Octavian decisively defeat an army under Brutus in the second part of the Battle of Philippi, with Brutus committing suicide and ending the civil war. 425 – Valentinian III is elevated as Roman emperor at the age of six. 502 – The Synodus Palmaris, called by Gothic king Theoderic, absolves Pope Symmachus of all charges, thus ending the schism of Antipope Laurentius.
November 15655 – Battle of the Winwaed: Penda of Mercia is defeated by Oswiu of Northumbria. 1315 – Growth of the Old Swiss Confederacy: The Schweizer Eidgenossenschaft ambushes the army of Leopold I in the Battle of Morgarten. 1532 – Spanish conquest of the Inca Empire: Commanded by Francisco Pizarro, Spanish conquistadors under Hernando de Soto meet Incan Emperor Atahualpa for the first time outside Cajamarca, arranging for a meeting in the city plaza the following day. 1533 – Francisco Pizarro arrives in Cuzco, the capital of the Inca Empire.
February 121096 – Pope Urban II confirms the foundation of the abbey of La Roë under Robert of Arbrissel as a community of canons regular. 1404 – The Italian professor Galeazzo di Santa Sophie performed the first post-mortem autopsy for the purposes of teaching and demonstration at the Heiligen–Geist Spital in Vienna. 1429 – English forces under Sir John Fastolf defend a supply convoy carrying rations to the army besieging Orléans in the Battle of the Herrings.
November 18326 – The old St. Peter's Basilica is consecrated by Pope Sylvester I. 401 – The Visigoths, led by king Alaric I, cross the Alps and invade northern Italy. 1095 – The Council of Clermont begins: called by Pope Urban II, it led to the First Crusade to the Holy Land. 1105 – Maginulfo is elected Antipope Sylvester IV in opposition to Pope Paschal II. 1210 – Pope Innocent III excommunicates Holy Roman Emperor Otto IV for invading the Kingdom of Sicily after promising to recognize papal control over it.
July 6371 BC – The Battle of Leuctra shatters Sparta's reputation of military invincibility. 640 – Battle of Heliopolis: The Muslim Arab army under 'Amr ibn al-'As defeat the Byzantine forces near Heliopolis (Egypt). 1253 – Mindaugas is crowned King of Lithuania. 1348 – Pope Clement VI issues a papal bull protecting the Jews accused of having caused the Black Death. 1411 – Ming China's Admiral Zheng He returns to Nanjing after the third treasure voyage and presents the Sinhalese king, captured during the Ming–Kotte War, to the Yongle Emperor.
March 4AD 51 – Nero, later to become Roman emperor, is given the title princeps iuventutis (head of the youth). 306 – Martyrdom of Saint Adrian of Nicomedia. 852 – Croatian Knez Trpimir I issues a statute, a document with the first known written mention of the Croats name in Croatian sources. 938 – Translation of the relics of martyr Wenceslaus I, Duke of Bohemia, Prince of the Czechs. 1152 – Frederick I Barbarossa is elected King of Germany. 1238 – The Battle of the Sit River begins two centuries of Mongol horde domination of Russia.
November 9694 – At the Seventeenth Council of Toledo, Egica, a king of the Visigoths of Hispania, accuses Jews of aiding Muslims, sentencing all Jews to slavery. 1277 – The Treaty of Aberconwy, a humiliating settlement forced on Llywelyn ap Gruffudd by King Edward I of England, brings a temporary end to the Welsh Wars. 1313 – Louis the Bavarian defeats his cousin Frederick I of Austria at the Battle of Gammelsdorf. 1330 – At the Battle of Posada, Basarab I of Wallachia defeats the Hungarian army of Charles I Robert.
July 11472 – After being besieged in Rome by his own generals, Western Roman Emperor Anthemius is captured in St. Peter's Basilica and put to death. 813 – Byzantine emperor Michael I, under threat by conspiracies, abdicates in favor of his general Leo the Armenian, and becomes a monk (under the name Athanasius). 911 – Signing of the Treaty of Saint-Clair-sur-Epte between Charles the Simple and Rollo of Normandy. 1174 – Baldwin IV, 13, becomes King of Jerusalem, with Raymond III, Count of Tripoli as regent and William of Tyre as chancellor.
March 10241 BC – First Punic War: Battle of the Aegates: The Romans sink the Carthaginian fleet bringing the First Punic War to an end. 298 – Roman Emperor Maximian concludes his campaign in North Africa and makes a triumphal entry into Carthage. 947 – The Later Han is founded by Liu Zhiyuan. He declares himself emperor. 1496 – After establishing the city of Santo Domingo, Christopher Columbus departs for Spain, leaving his brother in command. 1535 – Spaniard Fray Tomás de Berlanga, the fourth Bishop of Panama, discovers the Galápagos Islands by chance on his way to Peru.
April 19AD 65 – The freedman Milichus betrays Piso's plot to kill the Emperor Nero and all of the conspirators are arrested. 531 – Battle of Callinicum: A Byzantine army under Belisarius is defeated by the Persians at Raqqa (northern Syria). 1506 – The Lisbon Massacre begins, in which accused Jews are slaughtered by Portuguese Catholics. 1529 – Beginning of the Protestant Reformation: After the Second Diet of Speyer bans Lutheranism, a group of rulers (German: Fürst) and independent cities protests the reinstatement of the Edict of Worms.
