October 18 is the 291st day of the Gregorian calendar (292th in leap years). There are 74 days to go until the end of the year.
31 - The letter-accusation from Tiberius is read in the Senate, which puts Sejanus under accusation.
614 - King Clotaire II promulgates the Edict of Paris in defense of the Frankish nobility and containing discriminatory limitations against the Jewish community of the city
629 - Dagobert I is crowned king of the Franks
1009 - Caliph Al-Hakim orders the destruction of the Basilica of the Holy Sepulcher in Jerusalem
1016 - Battle of Assandun between Canute the Great and Edmund II of England.
1081 - Battle of Durazzo: the Normans of Robert the Guiscard defeat the Byzantine army of Emperor Alexius I Comnenus
1356 - In Basel a terrible earthquake measuring 6.0 - 7.1 kills at least 1,000
1447 - Battle of Bosco Marengo: the forces of the Golden Ambrosian Republic led by Bartolomeo Colleoni clash with the French troops of Rinaldo di Dresay.
1534 - Case of the posters, during the night in several French cities posters against the Catholic creed and the Eucharist are posted
1540 - Troops of conquistador Hernando de Soto conquer the fortified city of Mabila, killing the Indian chief Tuskaloosa
1561 - Fourth battle of Kawanakajima between Takeda Shingen and Uesugi Kenshin.
1685 - Louis XIV of France promulgates the Edict of Fontainebleau, revoking the Edict of Nantes which had protected the French Protestants
1810 - The Scuola Normale Superiore of Pisa is founded
1817 - General Gomes Freire de Andrade, grand master of Portuguese freemasonry, and other conspirators, convicted of high treason, are executed in Portugal
1867 - The United States takes possession of Alaska (see Alaska Purchase)
1869 - signed the Treaty of Commerce and Navigation in German Freundschafts-, Handels- und Schifffahrtsvertrages zwischen Österreich-Ungarn und Japan
1898 - Spanish troops leave the island of Puerto Rico and the US military government is established on the island
1914 - The secular institute of the Schönstatt Fathers is born in Germany
1915 - The "Val Chisone" Alpine Battalion conquers the Martini ledge on the Piccolo Lagazuoi, starting the mine war on the Lagazuoi.
1922 - The British Broadcasting Company is founded
1931 - Lake Garda: the Western Gardesana state road is inaugurated
World War II: Adolf Hitler orders the creation of the national Volkssturm militia
World War II: the Soviet Union occupies Transcarpathia and advances into Czechoslovakia
1945 - With an opening hearing, the military tribunal for the Nuremberg Trials is established
1954 - Texas Instruments introduces the Regency TR-1, the first transistor radio
1963 - NASA presents the third group of astronauts chosen for future space missions of the Gemini Program and the Apollo Program
1967 - The Soviet space probe Venera 4 reaches the planet Venus and measures its atmosphere
1968 - Bob Beamon, with 8.90m, sets the long jump world record at the Mexico City Olympics. It will become the most enduring record in the history of athletics, enduring for 23 years
1969 - Caravaggio's painting "Nativity with Saints Lorenzo and Francesco d'Assisi" is stolen, preserved in the Oratory of San Lorenzo in Palermo
1975 - The Italian Environment Fund (FAI) is officially born in Italy
1977 - The Carabinieri GIS is established in Italy.
1981 - Andreas Papandreou's PaSoK wins 48% in general elections and establishes the first socialist-inspired government in Greece
1988 - The Israeli Supreme Court bans the Israeli ultra-nationalist party Kach for professing racist positions.
The Galileo probe is launched by NASA to study the planet Jupiter and its satellites.
Erich Honecker resigns from