| 90721 | August 11 | Event | 1786 – Captain Francis Light establishes the British colony of Penang in Malaysia. |
| 90722 | August 11 | Event | 1804 – Francis II assumes the title of first Emperor of Austria. |
| 90723 | August 11 | Event | 1812 – Peninsular War: French troops engage British-Portuguese forces in the Battle of Majadahonda. |
| 90724 | August 11 | Event | 1813 – In Colombia, Juan del Corral declares the independence of Antioquia. |
| 90725 | August 11 | Event | 1858 – The Eiger in the Bernese Alps is ascended for the first time by Charles Barrington accompanied by Christian Almer and Peter Bohren. |
| 90726 | August 11 | Event | 1898 – Spanish–American War: American troops enter the city of Mayagüez, Puerto Rico. |
| 90727 | August 11 | Event | 1918 – World War I: The Battle of Amiens ends. |
| 90728 | August 11 | Event | 1919 – The constitution of the Weimar Republic is adopted. |
| 90729 | August 11 | Event | 1920 – The Latvian–Soviet Peace Treaty, which relinquished Russia's authority and pretenses to Latvia, is signed, ending the Latvian War of Independence. |
| 90730 | August 11 | Event | 1929 – Babe Ruth becomes the first baseball player to hit 500 home runs in his career with a home run at League Park in Cleveland, Ohio. |
| 90731 | August 11 | Event | 1934 – The first civilian prisoners arrive at the Federal prison on Alcatraz Island. |
| 90732 | August 11 | Event | 1942 – Actress Hedy Lamarr and composer George Antheil receive a patent for a Frequency-hopping spread spectrum communication system that later became the basis for modern technologies in wireless telephones and Wi-Fi. |
| 90733 | August 11 | Event | 1945 – Poles in Kraków engage in a pogrom against Jews in the city, killing one and wounding five. |
| 90734 | August 11 | Event | 1947 – Muhammad Ali Jinnah, founding father of Pakistan, gives a speech to the Constituent Assembly, the contents and meaning of which remain contentious today. |
| 90735 | August 11 | Event | 1949 – United Nations Security Council Resolution 72 and 73 are adopted on Palestinian question. |
| 90736 | August 11 | Event | 1952 – Hussein bin Talal is proclaimed King of Jordan. |
| 90737 | August 11 | Event | 1959 – Sheremetyevo International Airport, the second-largest airport in Russia, opens. |
| 90738 | August 11 | Event | 1960 – Chad declares independence. |
| 90739 | August 11 | Event | 1961 – The former Portuguese territories in India of Dadra and Nagar Haveli are merged to create the Union Territory Dadra and Nagar Haveli. |
| 90740 | August 11 | Event | 1962 – Vostok 3 launches from the Baikonur Cosmodrome and cosmonaut Andrian Nikolayev becomes the first person to float in microgravity. |
| 90741 | August 11 | Event | 1965 – Race riots (the Watts Riots) begin in the Watts area of Los Angeles, California. |
| 90742 | August 11 | Event | 1968 – The last steam hauled train runs on British Rail |
| 90743 | August 11 | Event | 1972 – Vietnam War: The last United States ground combat unit leaves South Vietnam. |
| 90744 | August 11 | Event | 1975 – East Timor: Governor Mário Lemos Pires of Portuguese Timor abandons the capital Dili, following a coup by the Timorese Democratic Union (UDT) and the outbreak of civil war between UDT and Fretilin. |
| 90745 | August 11 | Event | 1979 – Two Aeroflot Tupolev Tu-134s collide over the Ukrainian city of Dniprodzerzhynsk and crash, killing all 178 aboard both airliners. |
| 90746 | August 11 | Event | 1982 – A bomb explodes on Pan Am Flight 830, en route from Tokyo, Japan to Honolulu, Hawaii, killing one passenger and injuring 15 others. |
| 90747 | August 11 | Event | 1984 – "We begin bombing in five minutes" – United States President Ronald Reagan, while running for re-election, jokes while preparing to make his weekly Saturday address on National Public Radio. |
| 90748 | August 11 | Event | 1995 - 1995 Russell Hill subway accident - The 1995 Russell Hill subway accident was a deadly train crash that occurred in Toronto, Ontario, Canada Three people were killed and 30 were taken to hospital with injuries when one train rear-ended another trai |
| 90749 | August 11 | Event | 1999 – The Salt Lake City Tornado tears through the downtown district of the city, killing one. |
| 90750 | August 11 | Event | 2003 – NATO takes over command of the peacekeeping force in Afghanistan, marking its first major operation outside Europe in its 54-year-history. |