September 18 events in history

14 Tiberius is confirmed as Roman emperor by the Roman Senate following the natural death of Augustus
96 Nerva is proclaimed Roman emperor after Domitian is assassinated
324 Constantine the Great decisively defeats Licinius in the Battle of Chrysopolis, establishing Constantine's sole control over the Roman Empire
1180 Philip Augustus becomes king of France
1454 In the Battle of Chojnice, the Polish army is defeated by the Teutonic army during the Thirteen Years' War
1502 Christopher Columbus lands at Honduras on his fourth, and final, voyage
1635 Holy Roman Emperor Ferdinand II of Austria declares war on France
1679 New Hampshire becomes a county of the Massachusetts Bay Colony
1714 George I arrives in Great Britain for the first time since becoming king on August 1st
1739 The Treaty of Belgrade is signed, ceding Belgrade to the Ottoman Empire
1759 Seven Years' War: The British capture Quebec City
1793 The first cornerstone of the Capitol building is laid by George Washington
1809 The Royal Opera House in London opens
1810 First Government Junta in Chile. Though supposed to rule only in the absence of the king, it is in fact the first step towards independence from Spain, and is commemorated as such
1812 The 1812 Fire of Moscow dies down after destroying more than three-quarters of the city. Napoleon returns from the Petrovsky Palace to the Moscow Kremlin, spared from the fire
1837 Tiffany and Co. (first named Tiffany & Young) is founded by Charles Lewis Tiffany and Teddy Young in New York City. The store is called a "stationery and fancy goods emporium"
1838 The Anti-Corn Law League is established by Richard Cobden
1850 The U.S. Congress passes the Fugitive Slave Act of 1850
1851 First publication of The New-York Daily Times, which later becomes The New York Times
1870 Old Faithful Geyser is observed and named by Henry D. Washburn during the Washburn–Langford–Doane Expedition to Yellowstone
1872 King Oscar II accedes to the throne of Sweden–Norway
1873 Panic of 1873: The U.S. bank Jay Cooke & Company declares bankruptcy, triggering a series of bank failures
1882 The Pacific Stock Exchange opens
1889 Hull House, the United States' most influential settlement house, opens in Chicago
1895 Booker T. Washington delivers the "Atlanta compromise" address
1895 Daniel David Palmer gives the first chiropractic adjustment
1898 Fashoda Incident: Lord Kitchener's ships reach Fashoda, Sudan
1906 A typhoon with tsunami kills an estimated 10,000 people in Hong Kong
1910 In Amsterdam, 25,000 demonstrate for general suffrage
1911 Russian Premier Pyotr Stolypin is shot at the Kiev Opera House
1914 The Irish Home Rule Act becomes law, but is delayed until after World War I
1914 World War I: South African troops land in German South West Africa
1919 The Netherlands gives women the right to vote
1919 Fritz Pollard becomes the first African American to play professional football for a major team, the Akron Pros
1922 Hungary is admitted to the League of Nations
1927 The Columbia Broadcasting System goes on the air
1928 Juan de la Cierva makes the first autogyro crossing of the English Channel
1931 The Mukden Incident gives Japan the pretext to invade and occupy Manchuria
1939 World War II: Polish government of Ignacy Mościcki flees to Romania
1939 The Nazi propaganda broadcaster known as Lord Haw-Haw begins transmitting
1940 The British liner SS City of Benares is sunk by German submarine U-48; those killed include 77 child refugees
1943 World War II: The Jews of Minsk are massacred at Sobibór
1943 World War II: Adolf Hitler orders the deportation of Danish Jews
1944 World War II: The British submarine HMS Tradewind torpedoes Jun'yō Maru, 5,600 killed
1945 General Douglas MacArthur moves his command headquarters to Tokyo
1947 The United States Air Force becomes an independent branch of the United States armed forces
1947 The National Security Council and the Central Intelligence Agency are established in the United States under the National Security Act
1948 Operation Polo is terminated after the Indian Army accepts the surrender of Nizam's Army
1948 Communist Madiun uprising in Dutch Indies
1948 Margaret Chase Smith of Maine becomes the first woman elected to the United States Senate without completing another senator's term, when she defeats Democratic opponent Adrian Scolten