📅 Today in HistoryJune 18

Li Yuan becomes Emperor Gaozu of Tang, initiating three centuries of Tang dynasty rule over China.

Ali becomes Caliph of the Rashidun Caliphate.

Byzantine-Rus' War: A fleet of about 200 Rus' vessels sails into the Bosphorus and starts pillaging the suburbs of the Byzantine capital Constantinople.

Battle of Civitate: Three thousand Norman horsemen of Count Humphrey rout the troops of Pope Leo IX..

Pope Adrian IV crowns Frederick Barbarossa as Holy Roman Emperor.

The treaty of Benevento between pope Adrian IV and William I of Sicily is concluded.

The Parliament of Ireland meets at Castledermot in County Kildare, the first definitively known meeting of this Irish legislature.

A draft Byzantine-Venetian treaty is concluded between Venetian envoys and Emperor Michael VIII Palaiologos, but is not ratified by Doge Reniero Zeno.

Tokhtamysh-Timur war: Battle of the Kondurcha River: Timur defeats Tokhtamysh of the Golden Horde in present-day southeast Russia.

Charles VII's army defeats an English army under John Talbot at the Battle of Patay during the Hundred Years' War. The English lost 2,200 men, over half their army, crippling their efforts during this segment of the war.