October 6105 BC – Cimbrian War: Defeat at the Battle of Arausio of the Roman army of the mid-Republic 69 BC – Third Mithridatic War: The military of the Roman Republic subdue Armenia. AD 23 – Rebels decapitate Wang Mang two days after his capital was sacked during a peasant rebellion. 404 – Byzantine Empress Eudoxia dies from the miscarriage of her seventh pregnancy. 618 – Transition from Sui to Tang: Wang Shichong decisively defeats Li Mi at the Battle of Yanshi. 1539 – Spain's DeSoto expedition takes over the Apalachee capital of Anhaica for their winter quarters.
September 2961 BC – Pompey the Great celebrates his third triumph for victories over the pirates and the end of the Mithridatic Wars on his 45th birthday. 1011 – Danes capture Canterbury after a siege, taking Ælfheah, archbishop of Canterbury, as a prisoner. 1227 – Frederick II, Holy Roman Emperor, is excommunicated by Pope Gregory IX for his failure to participate in the Crusades during the Investiture Controversy. 1267 – The Treaty of Montgomery recognises Llywelyn ap Gruffudd as Prince of Wales, but only as a vassal of King Henry III.
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.
April 29801 – An earthquake in the Central Apennines hits Rome and Spoleto, damaging the basilica of San Paolo Fuori le Mura. 1091 – Battle of Levounion: The Pechenegs are defeated by Byzantine Emperor Alexios I Komnenos. 1386 – Battle of the Vikhra River: The Principality of Smolensk is defeated by the Grand Duchy of Lithuania and becomes its vassal. 1429 – Joan of Arc arrives to relieve the Siege of Orléans. 1483 – Gran Canaria, the main island of the Canary Islands, is conquered by the Kingdom of Castile.
January 141236 – King Henry III of England marries Eleanor of Provence. 1301 – Andrew III of Hungary dies, ending the Árpád dynasty in Hungary. 1639 – The "Fundamental Orders", the first written constitution that created a government, is adopted in Connecticut. 1761 – The Third Battle of Panipat is fought in India between the Afghans under Ahmad Shah Durrani and the Marathas. 1784 – American Revolutionary War: Ratification Day, United States - Congress ratifies the Treaty of Paris with Great Britain.
May 18332 – Emperor Constantine the Great announces free distributions of food to the citizens in Constantinople. 872 – Louis II of Italy is crowned for the second time as Holy Roman Emperor at Rome, at the age of 47. His first coronation was 28 years earlier, in 844, during the reign of his father Lothair I. 1096 – First Crusade: Around 800 Jews are massacred in Worms, Germany. 1152 – The future Henry II of England marries Eleanor of Aquitaine. He would become king two years later, after the death of his cousin once removed King Stephen of England.
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.
September 1985 – Nerva, suspected of complicity of the death of Domitian, is declared emperor by Senate. The Senate then annuls laws passed by Domitian and orders his statues to be destroyed. 634 – Siege of Damascus: The Rashidun Arabs under Khalid ibn al-Walid capture Damascus from the Byzantine Empire. 1356 – Battle of Poitiers: An English army under the command of Edward the Black Prince defeats a French army and captures King John II. 1410 – End of the Siege of Marienburg: The State of the Teutonic Order repulses the joint Polish—Lithuanian forces.
August 15636 – Arab–Byzantine wars: The Battle of Yarmouk between the Byzantine Empire and the Rashidun Caliphate begins. 717 – Arab–Byzantine wars: Maslama ibn Abd al-Malik begins the Second Arab Siege of Constantinople, which will last for nearly a year. 718 – Arab–Byzantine wars: Raising of the Second Arab Siege of Constantinople. 747 – Carloman, mayor of the palace of Austrasia, renounces his position as majordomo and retires to a monastery near Rome. His brother, Pepin the Short, becomes the sole ruler (de facto) of the Frankish Kingdom.
June 21533 (approximate date) – A Byzantine expeditionary fleet under Belisarius sails from Constantinople to attack the Vandals in Africa, via Greece and Sicily . 1307 – Külüg Khan is enthroned as Khagan of the Mongols and Wuzong of the Yuan. 1529 – French forces are driven out of northern Italy by Spain at the Battle of Landriano during the War of the League of Cognac. 1582 – Sengoku period: Oda Nobunaga, the most powerful of the Japanese daimyōs, is forced to commit suicide by his own general Akechi Mitsuhide.
