| 103561 | September 11 | Event | 1922 – One of the Herald Sun of Melbourne, Australia's predecessor papers The Sun News-Pictorial is founded. |
| 103562 | September 11 | Event | 1931 – Salvatore Maranzano is murdered by Lucky Luciano's hitmen. |
| 103563 | September 11 | Event | 1932 – Franciszek Żwirko and Stanisław Wigura, Polish Challenge 1932 winners, are killed when their RWD 6 airplane crashes during a storm. |
| 103564 | September 11 | Event | 1939 – World War II: Canada declares war on Germany, the country's first independent declaration of war |
| 103565 | September 11 | Event | 1940 – George Stibitz performs the first remote operation of a computer. |
| 103566 | September 11 | Event | 1941 – Ground is broken for the construction of The Pentagon. |
| 103567 | September 11 | Event | 1941 – Charles Lindbergh's Des Moines Speech accusing the British, Jews and the Roosevelt administration of pressing for war with Germany. |
| 103568 | September 11 | Event | 1943 – World War II: German troops occupy Corsica and Kosovo-Metohija. |
| 103569 | September 11 | Event | 1943 – World War II: Start of the liquidation of the Ghettos in Minsk and Lida by the Nazis. |
| 103570 | September 11 | Event | 1944 – World War II: The first Allied troops of the U.S. Army cross the western border of Germany. |
| 103571 | September 11 | Event | 1944 – World War II: RAF bombing raid on Darmstadt and the following firestorm kill 11,500. |
| 103572 | September 11 | Event | 1945 – World War II: Australian 9th Division forces liberate the Japanese-run Batu Lintang camp, a POW and civilian internment camp on the island of Borneo. |
| 103573 | September 11 | Event | 1950 – Korean War: President Harry S. Truman approved military operations north of the 38th parallel. |
| 103574 | September 11 | Event | 1954 – Hurricane Edna hits New England as a Category 1 hurricane, causing significant damage and 29 deaths. |
| 103575 | September 11 | Event | 1961 – Hurricane Carla strikes the Texas coast as a Category 4 hurricane, the second strongest storm ever to hit the state. |
| 103576 | September 11 | Event | 1965 – Indo-Pakistani War: The Indian Army captures the town of Burki, just southeast of Lahore. |
| 103577 | September 11 | Event | 1968 – Air France Flight 1611 crashes off Nice, France, killing 89 passengers and six crew. |
| 103578 | September 11 | Event | 1968 – The International Association of Classification Societies (IACS) was founded. |
| 103579 | September 11 | Event | 1970 – The Dawson's Field hijackers release 88 of their hostages. The remaining hostages, mostly Jews and Israeli citizens, are held until September 25. |
| 103580 | September 11 | Event | 1971 – The Egyptian Constitution becomes official. |
| 103581 | September 11 | Event | 1972 – The San Francisco Bay Area Rapid Transit system begins passenger service. |
| 103582 | September 11 | Event | 1973 – A coup in Chile headed by General Augusto Pinochet topples the democratically elected president Salvador Allende. Pinochet exercises dictatorial power until ousted in a referendum in 1988, staying in power until 1990. |
| 103583 | September 11 | Event | 1974 – Eastern Air Lines Flight 212 crashes in Charlotte, North Carolina, killing 69 passengers and two crew. |
| 103584 | September 11 | Event | 1976 – A group of Croatian nationalists plant a bomb in a coin locker at Grand Central Terminal. After stating political demands, they reveal the location and provided instructions for disarming the bomb. The disarming operation are not executed properly |
| 103585 | September 11 | Event | 1978 – Janet Parker is the last person to die of smallpox, in a laboratory-associated outbreak. |
| 103586 | September 11 | Event | 1980 – Voters approve a new Constitution of Chile, later amended after the departure of president Pinochet. |
| 103587 | September 11 | Event | 1982 – The international forces that were guaranteeing the safety of Palestinian refugees following Israel's 1982 Invasion of Lebanon leave Beirut. Five days later, several thousand refugees are massacred in the Sabra and Shatila refugee camps. |
| 103588 | September 11 | Event | 1985 – Pete Rose breaks Ty Cobb's baseball record for most career hits with his 4,192nd hit. |
| 103589 | September 11 | Event | 1988 – The St. Jean Bosco massacre takes place in Port-au-Prince, Haiti. |
| 103590 | September 11 | Event | 1989 – Hungary announces that the East German refugees who had been housed in temporary camps were free to leave for West Germany. |