July 26657 – First Fitna: In the Battle of Siffin, troops led by Ali ibn Abu Talib clash with those led by Muawiyah I. 811 – Battle of Pliska: Byzantine Emperor Nikephoros I is killed and his heir Staurakios is seriously wounded. 920 – Rout of an alliance of Christian troops from Navarre and Léon against the Muslims at the Battle of Valdejunquera. 1309 – The Holy Roman Emperor Henry VII is recognized King of the Romans by Pope Clement V. 1509 – The Emperor Krishnadevaraya ascends to the throne, marking the beginning of the regeneration of the Vijayanagara Empire.
July 29587 BC – The Neo-Babylonian Empire sacks Jerusalem and destroys the First Temple. 615 – Pakal ascends the throne of Palenque at the age of 12. 904 – Sack of Thessalonica: Saracen raiders under Leo of Tripoli sack Thessaloniki, the Byzantine Empire's second-largest city, after a short siege, and plunder it for a week. 923 – Battle of Firenzuola: Lombard forces under King Rudolph II and Adalbert I, margrave of Ivrea, defeat the dethroned Emperor Berengar I of Italy at Firenzuola (Tuscany).
January 1627 BC – Gaius Julius Caesar Octavianus is granted the title Augustus by the Roman Senate, marking the beginning of the Roman Empire. 378 – General Siyaj K'ak' conquers Tikal, enlarging the domain of King Spearthrower Owl of Teotihuacán. 550 – Gothic War: The Ostrogoths, under King Totila, conquer Rome after a long siege, by bribing the Isaurian garrison. 929 – Emir Abd-ar-Rahman III establishes the Caliphate of Córdoba. 1120 – Crusades: The Council of Nablus is held, establishing the earliest surviving written laws of the Crusader Kingdom of Jerusalem.
April 23215 BC – A temple is built on the Capitoline Hill dedicated to Venus Erycina to commemorate the Roman defeat at Lake Trasimene. 599 – Maya king Uneh Chan of Calakmul attacks rival city-state Palenque in southern Mexico, defeating queen Yohl Ik'nal and sacking the city. 711 – Dagobert III succeeds his father King Childebert III as King of the Franks. 1014 – Battle of Clontarf: High King of Ireland Brian Boru defeats Viking invaders, but is killed in battle. 1016 – Edmund Ironside succeeds his father Æthelred the Unready as King of England.
May 1305 – Diocletian and Maximian retire from the office of Roman emperor. 880 – The Nea Ekklesia is inaugurated in Constantinople, setting the model for all later cross-in-square Orthodox churches. 1169 – Norman mercenaries land at Bannow Bay in Leinster, marking the beginning of the Norman invasion of Ireland. 1328 – Wars of Scottish Independence end: By the Treaty of Edinburgh–Northampton, England recognises Scotland as an independent state. 1486 – Christopher Columbus presents his plans discovering a western route to the Indies to the Spanish Queen Isabella I of Castile.
May 3752 – Mayan king Bird Jaguar IV of Yaxchilan in modern-day Chiapas, Mexico, assumes the throne. 1481 – The largest of three earthquakes strikes the island of Rhodes and causes an estimated 30,000 casualties. 1491 – Kongo monarch Nkuwu Nzinga is baptised by Portuguese missionaries, adopting the baptismal name of João I. 1568 – Angered by the brutal onslaught of Spanish troops at Fort Caroline, a French force burns the San Mateo fort and massacres hundreds of Spaniards. 1616 – Treaty of Loudun ends a French civil war.
March 30598 – Balkan Campaign: The Avars lift the siege at the Byzantine stronghold of Tomis. Their leader Bayan I retreats north of the Danube River after the Avaro-Slavic hordes are decimated by the plague. 1282 – The people of Sicily rebel against the Angevin king Charles I, in what becomes known as the Sicilian Vespers. 1296 – Edward I sacks Berwick-upon-Tweed, during armed conflict between Scotland and England. 1699 – Guru Gobind Singh establishes the Khalsa in Anandpur Sahib, Punjab.
March 271309 – Pope Clement V imposes excommunication and interdiction on Venice, and a general prohibition of all commercial intercourse with Venice, which had seized Ferrara, a papal fiefdom. 1329 – Pope John XXII issues his In Agro Dominico condemning some writings of Meister Eckhart as heretical. 1513 – Spanish explorer Juan Ponce de León reaches the northern end of The Bahamas on his first voyage to Florida. 1625 – Charles I becomes King of England, Scotland and Ireland as well as claiming the title King of France.
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.
November 27AD 25 – Luoyang is declared capital of the Eastern Han dynasty by Emperor Guangwu of Han. 176 – Emperor Marcus Aurelius grants his son Commodus the rank of "Imperator" and makes him Supreme Commander of the Roman legions. 395 – Rufinus, praetorian prefect of the East, is murdered by Gothic mercenaries under Gainas. 511 – King Clovis I dies at Lutetia and is buried in the Abbey of St Genevieve. 602 – Byzantine Emperor Maurice is forced to watch as the usurper Phocas executes his five sons before Maurice is beheaded himself.
