| 101671 | September 7 | Event | 1778 – American Revolutionary War: France invades Dominica in the British West Indies, before Britain is even aware of France's involvement in the war. |
| 101672 | September 7 | Event | 1812 – French invasion of Russia: The Battle of Borodino, the bloodiest battle of the Napoleonic Wars, was fought near Moscow and resulted in a French victory. |
| 101673 | September 7 | Event | 1818 – Carl III of Sweden–Norway is crowned king of Norway, in Trondheim. |
| 101674 | September 7 | Event | 1822 – Dom Pedro I declares Brazil independent from Portugal on the shores of the Ipiranga Brook in São Paulo. |
| 101675 | September 7 | Event | 1857 – Mountain Meadows massacre: Mormon settlers slaughter most members of peaceful, emigrant wagon train. |
| 101676 | September 7 | Event | 1860 – Italian unification: Giuseppe Garibaldi enters Naples. |
| 101677 | September 7 | Event | 1864 – American Civil War: Atlanta is evacuated on orders of Union General William Tecumseh Sherman. |
| 101678 | September 7 | Event | 1873 – Emilio Castelar y Ripoll becomes President of the First Spanish Republic. |
| 101679 | September 7 | Event | 1876 – In Northfield, Minnesota, Jesse James and the James–Younger Gang attempt to rob the town's bank but are driven off by armed citizens. |
| 101680 | September 7 | Event | 1893 – The Genoa Cricket & Athletic Club, to become one of the oldest Italian football clubs, is established by British expats. |
| 101681 | September 7 | Event | 1895 – The first game of what would become known as rugby league football is played, in England, starting the 1895–96 Northern Rugby Football Union season. |
| 101682 | September 7 | Event | 1901 – The Boxer Rebellion in Qing dynasty China officially ends with the signing of the Boxer Protocol. |
| 101683 | September 7 | Event | 1906 – Alberto Santos-Dumont flies his 14-bis aircraft at Bagatelle, France for the first time successfully. |
| 101684 | September 7 | Event | 1907 – Cunard Line's RMS Lusitania sets sail on her maiden voyage from Liverpool, England, to New York City. |
| 101685 | September 7 | Event | 1909 – Eugène Lefebvre crashes a new French-built Wright biplane during a test flight at Juvisy, south of Paris, becoming the first aviator in the world to lose his life in a powered heavier-than-air craft. |
| 101686 | September 7 | Event | 1911 – French poet Guillaume Apollinaire is arrested and put in jail on suspicion of stealing the Mona Lisa from the Louvre museum. |
| 101687 | September 7 | Event | 1916 – US federal employees win the right to Workers' compensation by Federal Employers Liability Act (39 Stat. 742 5 U.S.C. 751) |
| 101688 | September 7 | Event | 1920 – Two newly purchased Savoia flying boats crash in the Swiss Alps en route to Finland where they would serve with the Finnish Air Force, killing both crews. |
| 101689 | September 7 | Event | 1921 – In Atlantic City, New Jersey, the first Miss America Pageant, a two-day event, is held. |
| 101690 | September 7 | Event | 1921 – The Legion of Mary, the largest apostolic organization of lay people in the Catholic Church, is founded in Dublin, Ireland. |
| 101691 | September 7 | Event | 1922 – In Aydın, Turkey, independence of Aydın, from Greek occupation. |
| 101692 | September 7 | Event | 1922 – The Bank of Latvia established. |
| 101693 | September 7 | Event | 1927 – The first fully electronic television system is achieved by Philo Farnsworth. |
| 101694 | September 7 | Event | 1928 – The first Tour de Pologne began. |
| 101695 | September 7 | Event | 1929 – Steamer Kuru capsizes and sinks on Lake Näsijärvi near Tampere in Finland. 136 lives are lost. |
| 101696 | September 7 | Event | 1932 – The Battle of Boquerón, the first major battle of the Chaco War, commences. |
| 101697 | September 7 | Event | 1936 – The last thylacine, a carnivorous marsupial named Benjamin, dies alone in its cage at the Hobart Zoo in Tasmania. |
| 101698 | September 7 | Event | 1940 – Treaty of Craiova: Romania loses Southern Dobruja to Bulgaria. |
| 101699 | September 7 | Event | 1940 – World War II: The German Luftwaffe begins the Blitz, bombing London and other British cities for over 50 consecutive nights. |
| 101700 | September 7 | Event | 1942 – First flight of the Consolidated B-32 Dominator. |