June 18 is the 169th day of the year (170th in leap years) in the Gregorian calendar; 196 days remain until the end of the year.
Pre-1600 618 – Li Yuan becomes Emperor Gaozu of Tang, initiating three centuries of Tang dynasty rule over China. 656 – Ali becomes Caliph of the Rashidun Caliphate.
860 – Byzantine–Rus' War: A fleet of about 200 Rus' vessels sails into the Bosphorus and starts pillaging the suburbs of the Byzantine capital Constantinople.
1053 – Battle of Civitate: Three thousand Norman horsemen of Count Humphrey rout the troops of Pope Leo IX.
1264 – The Parliament of Ireland meets at Castledermot in County Kildare, the first definitively known meeting of this Irish legislature.
1265 – A draft Byzantine–Venetian treaty is concluded between Venetian envoys and Emperor Michael VIII Palaiologos, but is not ratified by Doge Reniero Zeno.
1391 – Tokhtamysh–Timur war: Battle of the Kondurcha River: Timur defeats Tokhtamysh of the Golden Horde in present-day southeast Russia.[1] 1429 – 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.[2] 1601–1900
1633 – Charles I is crowned King of Scots at St Giles' Cathedral, Edinburgh. 1684 – The charter of the Massachusetts Bay Colony is revoked via a scire facias writ issued by an English court.
1757 – Battle of Kolín between Prussian forces under Frederick the Great and an Austrian army under the command of Field Marshal Count Leopold Joseph von Daun in the Seven Years' War.
1778 – American Revolutionary War: The British Army abandons Philadelphia.
1799 – Action of 18 June 1799: A frigate squadron under Rear-admiral Jean-Baptiste Perrée is captured by the British fleet under Lord Keith.
1803 – Haitian Revolution: The Royal Navy led by Rear-Admiral John Thomas Duckworth commence the blockade of Saint-Domingue against French forces.[3] 1812 – The United States declaration of war upon the United Kingdom is signed by President James Madison, beginning the War of 1812.
1815 – Napoleonic Wars: The Battle of Waterloo results in the defeat of Napoleon Bonaparte by the Duke of Wellington and Gebhard Leberecht von Blücher forcing him to abdicate the throne of France for the second and last time.
1822 – Konstantinos Kanaris blows up the Ottoman navy's flagship at Chios, killing the Kapudan Pasha Nasuhzade Ali Pasha.[4] 1858 – Charles Darwin receives a paper from Alfred Russel Wallace that includes nearly identical conclusions about evolution as Darwin's own, prompting Darwin to publish his theory.
1859 – First ascent of Aletschhorn, second summit of the Bernese Alps.
1873 – Susan B. Anthony is fined $100 for attempting to vote in the 1872 presidential election.
1887 – The Reinsurance Treaty between Germany and Russia is signed.
1900 – Empress Dowager Cixi of China orders all foreigners killed, including foreign diplomats and their families.
1901–present
1908 – Japanese immigration to Brazil begins when 781 people arrive in Santos aboard the ship Kasato-Maru. 1908 – The University of the Philippines is established.
1920 – The Troubles in Ulster (1920–1922) begin with a week of sectarian violence in Derry.[5] 1928 – Aviator Amelia Earhart becomes the first woman to fly in an aircraft across the Atlantic Ocean (she is a passenger; Wilmer Stultz is the pilot and Lou Gordon the mechanic).
1935 – Police in Vancouver, British Columbia, Canada, clash with striking longshoremen, resulting in a total of 60 injuries and 24 arrests.