| 101251 | September 6 | Event | 1861 – American Civil War: Forces under Union General Ulysses S. Grant bloodlessly capture Paducah, Kentucky, giving the Union control of the Tennessee River's mouth. |
| 101252 | September 6 | Event | 1863 – American Civil War: Confederate forces evacuate Battery Wagner and Morris Island in South Carolina. |
| 101253 | September 6 | Event | 1870 – Louisa Ann Swain of Laramie, Wyoming becomes the first woman in the United States to cast a vote legally after 1807. |
| 101254 | September 6 | Event | 1885 – Eastern Rumelia declares its union with Bulgaria. Bulgarian unification is henceforth accomplished. |
| 101255 | September 6 | Event | 1901 – Leon Czolgosz, an unemployed anarchist, shoots and fatally wounds US President William McKinley at the Pan-American Exposition in Buffalo, New York. |
| 101256 | September 6 | Event | 1916 – The first self-service grocery store, Piggly Wiggly, was opened in Memphis, Tennessee, by Clarence Saunders. |
| 101257 | September 6 | Event | 1930 – Democratically elected Argentine president Hipólito Yrigoyen is deposed in a military coup. |
| 101258 | September 6 | Event | 1939 – World War II: At the Battle of Barking Creek, Britain suffers its first fighter pilot casualty of the Second World War as a result of friendly fire. |
| 101259 | September 6 | Event | 1939 – World War II: South Africa declares war on Nazi Germany. |
| 101260 | September 6 | Event | 1940 – King Carol II of Romania abdicates and is succeeded by his son Michael. |
| 101261 | September 6 | Event | 1943 – The Monterrey Institute of Technology, one of the largest and most influential private universities in Latin America, is founded in Monterrey, Mexico. |
| 101262 | September 6 | Event | 1943 – Pennsylvania Railroad's premier train derails at Frankford Junction in Philadelphia, killing 79 people and injuring 117 others. |
| 101263 | September 6 | Event | 1944 – World War II: The city of Ypres, Belgium is liberated by Allied forces. |
| 101264 | September 6 | Event | 1944 – World War II: Soviet forces capture the city of Tartu, Estonia. |
| 101265 | September 6 | Event | 1946 – United States Secretary of State James F. Byrnes announces that the U.S. will follow a policy of economic reconstruction in postwar Germany. |
| 101266 | September 6 | Event | 1948 – Juliana becomes Queen of the Netherlands. |
| 101267 | September 6 | Event | 1949 – Allied military authorities relinquish control of former Nazi Germany assets back to German control. |
| 101268 | September 6 | Event | 1952 – A prototype aircraft crashes at the Farnborough Airshow in Hampshire, England, killing 29 spectators and the two on board. |
| 101269 | September 6 | Event | 1955 – Istanbul's Greek, Jewish and Armenian minority are the target of a government-sponsored pogrom dozens die in the ensuing riots. |
| 101270 | September 6 | Event | 1962 – The United States government begins the Exercise Spade Fork nuclear readiness drill. |
| 101271 | September 6 | Event | 1962 – Archaeologist Peter Marsden discovers the first of the Blackfriars Ships dating back to the 2nd century AD in the Blackfriars area of the banks of the River Thames in London. |
| 101272 | September 6 | Event | 1963 – The Centre for International Industrial Property Studies (CEIPI) is founded. |
| 101273 | September 6 | Event | 1965 – India retaliates following Pakistan's Operation Grand Slam which results in the Indo-Pakistani War of 1965 that ends in a stalemate and follows the signing of the Tashkent Declaration. |
| 101274 | September 6 | Event | 1966 – In Cape Town, South Africa, the architect of Apartheid, Prime Minister Dr. Hendrik Verwoerd, is stabbed to death during a parliamentary meeting. |
| 101275 | September 6 | Event | 1968 – Swaziland becomes independent. |
| 101276 | September 6 | Event | 1970 – Two passenger jets bound from Europe to New York are simultaneously hijacked by Palestinian terrorist members of the PFLP and taken to Dawson's Field in Jordan. |
| 101277 | September 6 | Event | 1972 – Munich massacre: Nine Israel athletes taken hostage at the Munich Olympic Games by the Palestinian "Black September" terrorist group die (as did a German policeman) at the hands of the kidnappers during a failed rescue attempt. Two other Israeli at |
| 101278 | September 6 | Event | 1976 – Cold War: Soviet Air Force pilot Lieutenant Viktor Belenko lands a Mikoyan-Gurevich MiG-25 jet fighter at Hakodate on the island of Hokkaidō in Japan and requests political asylum in the United States his request is granted. |
| 101279 | September 6 | Event | 1983 – The Soviet Union admits to shooting down Korean Air Lines Flight 007, stating that the pilots did not know it was a civilian aircraft when it violated Soviet airspace. |
| 101280 | September 6 | Event | 1985 – Midwest Express Airlines Flight 105, a Douglas DC-9 crashes just after takeoff from Milwaukee, Wisconsin, killing 31. |