August 113114 BC – The Mesoamerican Long Count calendar, used by several pre-Columbian Mesoamerican civilizations, notably the Maya, begins. 2492 BC – Traditional date of the defeat of Bel by Hayk, progenitor and founder of the Armenian nation. 106 – The south-western part of Dacia (modern Romania) becomes a Roman province: Roman Dacia. 355 – Claudius Silvanus, accused of treason, proclaims himself Roman Emperor against Constantius II. 490 – Battle of Adda: The Goths under Theodoric the Great and his ally Alaric II defeat the forces of Odoacer on the Adda River, near Milan.
December 291170 – Thomas Becket, Archbishop of Canterbury, is assassinated inside Canterbury Cathedral by followers of King Henry II; he subsequently becomes a saint and martyr in the Anglican Communion and the Catholic Church. 1503 – The Battle of Garigliano was fought between a Spanish army under Gonzalo Fernández de Córdoba and a French army commanded by Ludovico II, Marquess of Saluzzo. 1607 – According to John Smith, Pocahontas, daughter of Powhatan leader Wahunsenacawh, successfully pleads for his life after tribal leaders attempt to execute him.
October 211096 – A Seljuk Turkish army successfully fights off the People's Crusade. 1097 – First Crusade: Crusaders led by Godfrey of Bouillon, Bohemund of Taranto, and Raymond IV, Count of Toulouse, begin the Siege of Antioch. 1392 – Japanese Emperor Go-Kameyama abdicates in favor of rival claimant Go-Komatsu. 1512 – Martin Luther joins the theological faculty of the University of Wittenberg. 1520 – João Álvares Fagundes discovers the islands of Saint Pierre and Miquelon, bestowing them their original name of "Islands of the 11,000 Virgins".
June 271358 – The Republic of Ragusa is founded. 1497 – Cornish rebels Michael An Gof and Thomas Flamank are executed at Tyburn, London, England. 1499 – Amerigo Vespucci sights what is now Amapá State in Brazil. 1556 – The thirteen Stratford Martyrs are burned at the stake near London for their Protestant beliefs. 1743 – In the Battle of Dettingen, George II becomes the last reigning British monarch to participate in a battle. 1760 – Anglo-Cherokee War: Cherokee warriors defeat British forces at the Battle of Echoee near present-day Otto, North Carolina.
January 301018 – Poland and the Holy Roman Empire conclude the Peace of Bautzen. 1287 – King Wareru founds the Hanthawaddy Kingdom, and proclaims independence from the Pagan Kingdom. 1607 – An estimated 200 square miles (51,800 ha) along the coasts of the Bristol Channel and Severn Estuary in England are destroyed by massive flooding, resulting in an estimated 2,000 deaths. 1648 – Eighty Years' War: The Treaty of Münster and Osnabrück is signed, ending the conflict between the Netherlands and Spain.
January 2541 – After a night of negotiation, Claudius is accepted as Roman emperor by the Senate. 750 – In the Battle of the Zab, the Abbasid rebels defeat the Umayyad Caliphate, leading to the overthrow of the dynasty. 1348 – A strong earthquake strikes the South Alpine region of Friuli in modern Italy, causing considerable damage to buildings as far away as Rome. 1494 – Alfonso II becomes King of Naples. 1515 – Coronation of Francis I of France takes place at Reims Cathedral, where the new monarch is anointed with the oil of Clovis and girt with the sword of Charlemagne.
October 29312 – Constantine the Great enters Rome after his victory at the Battle of the Milvian Bridge, stages a grand adventus in the city, and is met with popular jubilation. Maxentius' body is fished out of the Tiber and beheaded. 437 – Valentinian III, Western Roman Emperor, marries Licinia Eudoxia, daughter of his cousin Theodosius II, Eastern Roman Emperor in Constantinople unifying the two branches of the House of Theodosius. 1268 – Conradin is executed along with his companion Frederick I, Margrave of Baden by Charles I of Sicily.
December 12627 – Battle of Nineveh: A Byzantine army under Emperor Heraclius defeats Emperor Khosrau II's Persian forces, commanded by General Rhahzadh. 1388 – Maria of Enghien sells the lordship of Argos and Nauplia to the Republic of Venice. 1787 – Pennsylvania becomes the second state to ratify the US Constitution. 1862 – American Civil War: sinks on the Yazoo River. 1866 – Oaks explosion: The worst mining disaster in England kills 361 miners and rescuers. 1870 – Joseph H. Rainey of South Carolina becomes the second black U.
July 169 – Tiberius Julius Alexander orders his Roman legions in Alexandria to swear allegiance to Vespasian as Emperor. 552 – Battle of Taginae: Byzantine forces under Narses defeat the Ostrogoths in Italy, and the Ostrogoth king, Totila, is mortally wounded. 1097 – Battle of Dorylaeum: Crusaders led by prince Bohemond of Taranto defeat a Seljuk army led by sultan Kilij Arslan I. 1431 – The Battle of La Higueruela takes place in Granada, leading to a modest advance of the Kingdom of Castile during the Reconquista.
June 12910 – Battle of Augsburg: The Hungarians defeat the East Frankish army under King Louis the Child, using the famous feigned retreat tactic of the nomadic warriors. 1240 – At the instigation of Louis IX of France, an inter-faith debate, known as the Disputation of Paris, starts between a Christian monk and four rabbis. 1381 – Peasants' Revolt: In England, rebels assemble at Blackheath, just outside London. 1418 – Armagnac–Burgundian Civil War: Parisians slaughter sympathizers of Bernard VII, Count of Armagnac, along with all prisoners, foreign bankers, and students and faculty of the College of Navarre.